syntax-check: fix violations and implement sc_old_style_quoting.

Modern GNU ASCII quoting in output and comments is done
'like this'.
* cfg.mk (sc_old_style_quoting): Try to catch most instances
of `old style quoting' so that it is not accidentally re-
introduced to the code.
* HACKING, Makefile.am, NEWS, PORTING, README, TODO, bootstrap,
bootstrap.conf, build-aux/edit-readme-alpha,
build-aux/git-hooks/commit-msg, build-aux/ltmain.in,
doc/libtool.texi, gl/build-aux/bootstrap.in,
gl/build-aux/extract-trace, gl/build-aux/funclib.sh,
gl/build-aux/inline-source, gl/build-aux/options-parser,
libltdl/libltdl/slist.h, libltdl/loaders/loadlibrary.c,
libltdl/ltdl.c, libltdl/slist.c, libtoolize.in, m4/argz.m4,
m4/libtool.m4, m4/ltdl.m4, m4/ltoptions.m4, m4/ltsugar.m4,
tests/cmdline_wrap.at, tests/configure-iface.at, tests/demo.at,
tests/depdemo.at, tests/deplib-in-subdir.at,
tests/deplibs-mingw.at, tests/destdir.at, tests/execute-mode.at,
tests/f77demo.at, tests/fail.at, tests/inherited_flags.at,
tests/libtool.at, tests/libtoolize.at, tests/lt_dladvise.at,
tests/lt_dlexit.at, tests/mdemo.at, tests/need_lib_prefix.at,
tests/old-ltdl-iface.at, tests/old-m4-iface.at, tests/static.at,
tests/stresstest.at, tests/testsuite.at, tests/versioning.at:
Convert to upright quotes.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>

1 files changed, 230 insertions, 230 deletions

diff --git a/bootstrap b/bootstrap
index 482618db..d3feb212 100755
--- a/bootstrap
+++ b/bootstrap
@@ -94,7 +94,7 @@ nl='
 '
 IFS="	$sp$nl"
 
-# There are still modern systems that have problems with `echo' mis-
+# There are still modern systems that have problems with 'echo' mis-
 # handling backslashes, among others, so make sure $bs_echo is set to a
 # command that correctly interprets backslashes.
 # (this code from Autoconf 2.68)
@@ -181,11 +181,11 @@ sed_make_literal_regex='s|[].[^$\\*\/]|\\&|g'
 # (escaped) backslashes.  A very naive implementation.
 sed_naive_backslashify='s|\\\\*|\\|g;s|/|\\|g;s|\\|\\\\|g'
 
-# Re-`\' parameter expansions in output of sed_double_quote_subst that
-# were `\'-ed in input to the same.  If an odd number of `\' preceded a
+# Re-'\' parameter expansions in output of sed_double_quote_subst that
+# were '\'-ed in input to the same.  If an odd number of '\' preceded a
 # '$' in input to sed_double_quote_subst, that '$' was protected from
-# expansion.  Since each input `\' is now two `\'s, look for any number
-# of runs of four `\'s followed by two `\'s and then a '$'.  `\' that '$'.
+# expansion.  Since each input '\' is now two '\'s, look for any number
+# of runs of four '\'s followed by two '\'s and then a '$'.  '\' that '$'.
 _G_bs='\\'
 _G_bs2='\\\\'
 _G_bs4='\\\\\\\\'
@@ -204,12 +204,12 @@ sed_double_backslash="\
 
 # Except for the global variables explicitly listed below, the following
 # functions in the '^func_' namespace, and the '^require_' namespace
-# variables initialised in the `Resource management' section, sourcing
+# variables initialised in the 'Resource management' section, sourcing
 # this file will not pollute your global namespace with anything
 # else. There's no portable way to scope variables in Bourne shell
 # though, so actually running these functions will sometimes place
 # results into a variable named after the function, and often use
-# temporary variables in the `^_G_' namespace. If you are careful to
+# temporary variables in the '^_G_' namespace. If you are careful to
 # avoid using those namespaces casually in your sourcing script, things
 # should continue to work as you expect. And, of course, you can freely
 # overwrite any of the functions or variables defined here before
@@ -221,7 +221,7 @@ EXIT_MISMATCH=63  # $? = 63 is used to indicate version mismatch to missing.
 EXIT_SKIP=77	  # $? = 77 is used to indicate a skipped test to automake.
 
 # Allow overriding, eg assuming that you follow the convention of
-# putting `$debug_cmd' at the start of all your functions, you can get
+# putting '$debug_cmd' at the start of all your functions, you can get
 # bash to show function call trace with:
 #
 #    debug_cmd='eval echo "${FUNCNAME[0]} $*" >&2' bash your-script-name
@@ -281,19 +281,19 @@ opt_dry_run=false
 opt_quiet=false
 opt_verbose=false
 
-# Categories `all' and `none' are always available.  Append any others
+# Categories 'all' and 'none' are always available.  Append any others
 # you will pass as the first argument to func_warning from your own
 # code.
 warning_categories=
 
-# By default, display warnings according to `opt_warning_types'.  Set
-# `warning_func'  to `:' to elide all warnings, or func_fatal_error to
+# By default, display warnings according to 'opt_warning_types'.  Set
+# 'warning_func'  to ':' to elide all warnings, or func_fatal_error to
 # treat the next displayed warning as a fatal error.
 warning_func=func_warn_and_continue
 
-# Set to `all' to display all warnings, `none' to suppress all
+# Set to 'all' to display all warnings, 'none' to suppress all
 # warnings, or a space delimited list of some subset of
-# `warning_categories' to display only the listed warnings.
+# 'warning_categories' to display only the listed warnings.
 opt_warning_types=all
 
 
@@ -305,7 +305,7 @@ opt_warning_types=all
 # particular resource (a file, or a non-empty configuration variable for
 # example) is available, and if appropriate to extract default values
 # from pertinent package files. Call them using their associated
-# `require_*' variable to ensure that they are executed, at most, once.
+# 'require_*' variable to ensure that they are executed, at most, once.
 #
 # It's entirely deliberate that calling these functions can set
 # variables that don't obey the namespace limitations obeyed by the rest
@@ -669,7 +669,7 @@ func_mkdir_p ()
 
     if test -n "$_G_directory_path" && test : != "$opt_dry_run"; then
 
-      # Protect directory names starting with `-'
+      # Protect directory names starting with '-'
       case $_G_directory_path in
         -*) _G_directory_path=./$_G_directory_path ;;
       esac
@@ -691,7 +691,7 @@ func_mkdir_p ()
       func_mkdir_p_IFS=$IFS; IFS=:
       for _G_dir in $_G_dir_list; do
 	IFS=$func_mkdir_p_IFS
-        # mkdir can fail with a `File exist' error if two processes
+        # mkdir can fail with a 'File exist' error if two processes
         # try to create one of the directories concurrently.  Don't
         # stop in that case!
         $MKDIR "$_G_dir" 2>/dev/null || :
@@ -700,7 +700,7 @@ func_mkdir_p ()
 
       # Bail out if we (or some other process) failed to create a directory.
       test -d "$_G_directory_path" || \
-        func_fatal_error "Failed to create \`$1'"
+        func_fatal_error "Failed to create '$1'"
     fi
 }
 
@@ -736,7 +736,7 @@ func_mktempdir ()
 
       # If we're not in dry-run mode, bomb out on failure
       test -d "$_G_tmpdir" || \
-        func_fatal_error "cannot create temporary directory \`$_G_tmpdir'"
+        func_fatal_error "cannot create temporary directory '$_G_tmpdir'"
     fi
 
     $ECHO "$_G_tmpdir"
@@ -902,7 +902,7 @@ func_relative_path ()
       func_append func_relative_path_result "/$func_stripname_result"
     fi
 
-    # Normalisation. If bindir is libdir, return `.' else relative path.
+    # Normalisation. If bindir is libdir, return '.' else relative path.
     if test -n "$func_relative_path_result"; then
       func_stripname './' '' "$func_relative_path_result"
       func_relative_path_result=$func_stripname_result
@@ -1132,7 +1132,7 @@ func_warn_and_continue ()
 # Echo program name prefixed warning message to standard error. Warning
 # messages can be filtered according to CATEGORY, where this function
 # elides messages where CATEGORY is not listed in the global variable
-# `opt_warning_types'.
+# 'opt_warning_types'.
 func_warning ()
 {
     $debug_cmd
@@ -1140,7 +1140,7 @@ func_warning ()
     # CATEGORY must be in the warning_categories list!
     case " $warning_categories " in
       *" $1 "*) ;;
-      *) func_internal_error "invalid warning category \`$1'" ;;
+      *) func_internal_error "invalid warning category '$1'" ;;
     esac
 
     _G_category=$1
@@ -1205,23 +1205,23 @@ scriptversion=2012-10-21.11; # UTC
 #   eval set dummy "$func_options_result"; shift
 #   ...rest of your script...
 #
-# In order for the `--version' option to work, you will need to have a
+# In order for the '--version' option to work, you will need to have a
 # suitably formatted comment like the one at the top of this file
 # starting with '# Written by ' and ending with '# warranty; '.
 #
-# For `-h' and `--help' to work, you will also need a one line
+# For '-h' and '--help' to work, you will also need a one line
 # description of your script's purpose in a comment directly above the
 # '# Written by ' line, like the one at the top of this file.
 #
-# The default options also support `--debug', which will turn on shell
+# The default options also support '--debug', which will turn on shell
 # execution tracing (see the comment above debug_cmd below for another
-# use), and `--verbose' and the func_verbose function to allow your script
+# use), and '--verbose' and the func_verbose function to allow your script
 # to display verbose messages only when your user has specified
-# `--verbose'.
+# '--verbose'.
 #
 # After sourcing this file, you can plug processing for additional
-# options by amending the variables from the `Configuration' section
-# below, and following the instructions in the `Option parsing'
+# options by amending the variables from the 'Configuration' section
+# below, and following the instructions in the 'Option parsing'
 # section further down.
 
 ## -------------- ##
@@ -1232,14 +1232,14 @@ scriptversion=2012-10-21.11; # UTC
 # file so that they reflect the customisations you have added to the
 # option parser.
 
-# The usage line for option parsing errors and the start of `-h' and
-# `--help' output messages. You can embed shell variables for delayed
+# The usage line for option parsing errors and the start of '-h' and
+# '--help' output messages. You can embed shell variables for delayed
 # expansion at the time the message is displayed, but you will need to
 # quote other shell meta-characters carefully to prevent them being
 # expanded when the contents are evaled.
 usage='$progpath [OPTION]...'
 
-# Short help message in response to `-h' and `--help'.  Add to this or
+# Short help message in response to '-h' and '--help'.  Add to this or
 # override it after sourcing this library to reflect the full set of
 # options your script accepts.
 usage_message="\
@@ -1251,15 +1251,15 @@ usage_message="\
    -h, --help         print short or long help message and exit
 "
 
-# Additional text appended to `usage_message' in response to `--help'.
+# Additional text appended to 'usage_message' in response to '--help'.
 long_help_message="
 Warning categories include:
-       \`all'          show all warnings
-       \`none'         turn off all the warnings
-       \`error'        warnings are treated as fatal errors"
+       'all'          show all warnings
+       'none'         turn off all the warnings
+       'error'        warnings are treated as fatal errors"
 
 # Help message printed before fatal option parsing errors.
-fatal_help='Try \`$progname --help'\'' for more information.'
+fatal_help="Try '\$progname --help' for more information."
 
 
 
@@ -1274,7 +1274,7 @@ fatal_help='Try \`$progname --help'\'' for more information.'
 # func_hookable FUNC_NAME
 # -----------------------
 # Declare that FUNC_NAME will run hooks added with
-# `func_add_hook FUNC_NAME ...'.
+# 'func_add_hook FUNC_NAME ...'.
 func_hookable ()
 {
     $debug_cmd
@@ -1286,14 +1286,14 @@ func_hookable ()
 # func_add_hook FUNC_NAME HOOK_FUNC
 # ---------------------------------
 # Request that FUNC_NAME call HOOK_FUNC before it returns.  FUNC_NAME must
-# first have been declared "hookable" by a call to `func_hookable'.
+# first have been declared "hookable" by a call to 'func_hookable'.
 func_add_hook ()
 {
     $debug_cmd
 
     case " $hookable_fns " in
       *" $1 "*) ;;
-      *) func_fatal_error "\`$1' does not accept hook functions." ;;
+      *) func_fatal_error "'$1' does not accept hook functions." ;;
     esac
 
     eval func_append ${1}_hooks '" $2"'
@@ -1324,7 +1324,7 @@ func_run_hooks ()
 
     case " $hookable_fns " in
       *" $1 "*) ;;
-      *) func_fatal_error "\`$1' does not support hook funcions.n" ;;
+      *) func_fatal_error "'$1' does not support hook funcions.n" ;;
     esac
 
     eval _G_hook_fns=\$$1_hooks; shift
@@ -1333,7 +1333,7 @@ func_run_hooks ()
       eval $_G_hook '"$@"'
 
       # store returned options list back into positional
-      # parameters for next `cmd' execution.
+      # parameters for next 'cmd' execution.
       eval _G_hook_result=\$${_G_hook}_result
       eval set dummy "$_G_hook_result"; shift
     done
@@ -1351,8 +1351,8 @@ func_run_hooks ()
 # In order to add your own option parsing hooks, you must accept the
 # full positional parameter list in your hook function, remove any
 # options that you action, and then pass back the remaining unprocessed
-# options in `<hooked_function_name>_result', escaped suitably for
-# `eval'.  Like this:
+# options in '<hooked_function_name>_result', escaped suitably for
+# 'eval'.  Like this:
 #
 #    my_options_prep ()
 #    {
@@ -1401,7 +1401,7 @@ func_run_hooks ()
 #        $debug_cmd
 #
 #        $opt_silent && $opt_verbose && func_fatal_help "\
-#    \`--silent' and \`--verbose' options are mutually exclusive."
+#    '--silent' and '--verbose' options are mutually exclusive."
 #
 #        func_quote_for_eval ${1+"$@"}
 #        my_option_validation_result=$func_quote_for_eval_result
@@ -1442,7 +1442,7 @@ func_options ()
 # Note that when calling hook functions, we pass through the list of
 # positional parameters.  If a hook function modifies that list, and
 # needs to propogate that back to rest of this script, then the complete
-# modified list must be put in `func_run_hooks_result' before
+# modified list must be put in 'func_run_hooks_result' before
 # returning.
 func_hookable func_options_prep
 func_options_prep ()
@@ -1515,7 +1515,7 @@ func_parse_options ()
                           ;;
                         *)
                           func_fatal_error \
-                             "unsupported warning category: \`$1'"
+                             "unsupported warning category: '$1'"
                           ;;
                       esac
                       shift
@@ -1550,7 +1550,7 @@ func_parse_options ()
                       ;;
 
         --)           break ;;
-        -*)           func_fatal_help "unrecognised option: \`$_G_opt'" ;;
+        -*)           func_fatal_help "unrecognised option: '$_G_opt'" ;;
         *)            set dummy "$_G_opt" ${1+"$@"}; shift; break ;;
       esac
     done
@@ -1628,7 +1628,7 @@ func_missing_arg ()
 {
     $debug_cmd
 
-    func_error "Missing argument for \`$1'."
+    func_error "Missing argument for '$1'."
     exit_cmd=exit
 }
 
@@ -1636,7 +1636,7 @@ func_missing_arg ()
 # func_split_equals STRING
 # ------------------------
 # Set func_split_equals_lhs and func_split_equals_rhs shell variables after
-# splitting STRING at the `=' sign.
+# splitting STRING at the '=' sign.
 test -z "$_G_HAVE_XSI_OPS" \
     && (eval 'x=a/b/c;
       test 5aa/bb/cc = "${#x}${x%%/*}${x%/*}${x#*/}${x##*/}"') 2>/dev/null \
@@ -1702,7 +1702,7 @@ func_usage ()
     $debug_cmd
 
     func_usage_message
-    $bs_echo "Run \`$progname --help |${PAGER-more}' for full usage"
+    $bs_echo "Run '$progname --help |${PAGER-more}' for full usage"
     exit 0
 }
 
@@ -1798,10 +1798,10 @@ scriptversion=2012-10-07.10; # UTC
 ## Usage. ##
 ## ------ ##
 
-# Run `./extract-trace --help' for help with using this script from the
+# Run './extract-trace --help' for help with using this script from the
 # command line.
 #
-# Or source first `options-parser' and then this file into your own
+# Or source first 'options-parser' and then this file into your own
 # scripts in order to make use of the function and variable framework
 # they define, and also to avoid the overhead of forking to run this
 # script in its own process on every call.
@@ -1813,7 +1813,7 @@ scriptversion=2012-10-07.10; # UTC
 ## ------------------##
 
 # This section contains the helper functions used by the rest of
-# `extract-trace'.
+# 'extract-trace'.
 
 
 # func_autoconf_configure MAYBE-CONFIGURE-FILE
@@ -1836,7 +1836,7 @@ func_autoconf_configure ()
     _G_status=$?
 
     test 0 -ne "$_G_status" \
-      && func_verbose "\`$1' not using Autoconf"
+      && func_verbose "'$1' not using Autoconf"
 
     (exit $_G_status)
 }
@@ -1869,7 +1869,7 @@ func_find_tool ()
     fi
     if test -n "$_G_find_tool_res"; then
       func_tool_version_output >/dev/null $_G_find_tool_res "\
-${_G_find_tool_error_prefix}Cannot run \`$_G_find_tool_res --version'"
+${_G_find_tool_error_prefix}Cannot run '$_G_find_tool_res --version'"
 
       # Make sure the result is exported to the environment for children
       # to use.
@@ -1885,12 +1885,12 @@ One of these is required:
 
 # func_tool_version_output CMD [FATAL-ERROR-MSG]
 # ----------------------------------------------
-# Attempt to run `CMD --version', discarding errors.  The output can be
+# Attempt to run 'CMD --version', discarding errors.  The output can be
 # ignored by redirecting stdout, and this function used simply to test
 # whether the command exists and exits normally when passed a
-# `--version' argument.
+# '--version' argument.
 # When FATAL-ERROR-MSG is given, then this function will display the
-# message and exit if running `CMD --version' returns a non-zero exit
+# message and exit if running 'CMD --version' returns a non-zero exit
 # status.
 func_tool_version_output ()
 {
@@ -1899,10 +1899,10 @@ func_tool_version_output ()
     _G_cmd=$1
     _G_fatal_error_msg=$2
 
-    # Some tools, like `git2cl' produce thousands of lines of output
+    # Some tools, like 'git2cl' produce thousands of lines of output
     # unless stdin is /dev/null - in that case we want to return
     # successfully without saving all of that output.  Other tools,
-    # such as `help2man' exit with a non-zero status when stdin comes
+    # such as 'help2man' exit with a non-zero status when stdin comes
     # from /dev/null, so we re-execute without /dev/null if that
     # happens.  This means that occasionally, the output from both calls
     # ends up in the result, but the alternative would be to discard the
@@ -1925,9 +1925,9 @@ func_tool_version_output ()
 # particular resource (a file, or a non-empty configuration variable for
 # example) is available, and if appropriate to extract default values
 # from pertinent package files.  Where a variable already has a non-
-# empty value (as set by the package's `bootstrap.conf'), that value is
+# empty value (as set by the package's 'bootstrap.conf'), that value is
 # used in preference to deriving the default. Call them using their
-# associated `require_*' variable to ensure that they are executed, at
+# associated 'require_*' variable to ensure that they are executed, at
 # most, once.
 #
 # It's entirely deliberate that calling these functions can set
@@ -1938,9 +1938,9 @@ func_tool_version_output ()
 
 # require_configure_ac
 # --------------------
-# Ensure that there is a `configure.ac' or `configure.in' file in the
+# Ensure that there is a 'configure.ac' or 'configure.in' file in the
 # current directory which contains an uncommented call to AC_INIT, and
-# that `$configure_ac' contains its name.
+# that '$configure_ac' contains its name.
 require_configure_ac=func_require_configure_ac
 func_require_configure_ac ()
 {
@@ -1951,7 +1951,7 @@ func_require_configure_ac ()
     test -z "$configure_ac" \
       && func_autoconf_configure configure.in && configure_ac=configure.in
     test -z "$configure_ac" \
-      || func_verbose "found \`$configure_ac'"
+      || func_verbose "found '$configure_ac'"
 
     require_configure_ac=:
 }
@@ -1971,7 +1971,7 @@ func_require_gnu_m4 ()
     }
 
     test -n "$M4" || func_fatal_error "\
-Please install GNU M4, or \`export M4=/path/to/gnu/m4'."
+Please install GNU M4, or 'export M4=/path/to/gnu/m4'."
 
     func_verbose "export M4='$M4'"
 
@@ -1987,15 +1987,15 @@ Please install GNU M4, or \`export M4=/path/to/gnu/m4'."
 ## --------------- ##
 
 # This section contains the high level functions used when calling this
-# file as a script. `func_extract_trace' is probably the only one that you
+# file as a script. 'func_extract_trace' is probably the only one that you
 # won't want to replace if you source this file into your own script.
 
 
 # func_extract_trace MACRO_NAMES [FILENAME]...
 # --------------------------------------------
-# set `$func_extract_trace_result' to a colon delimited list of arguments
+# set '$func_extract_trace_result' to a colon delimited list of arguments
 # to any of the comma separated list of MACRO_NAMES in FILENAME. If no
-# FILENAME is given, then `$configure_ac' is assumed.
+# FILENAME is given, then '$configure_ac' is assumed.
 func_extract_trace ()
 {
     $debug_cmd
@@ -2014,11 +2014,11 @@ func_extract_trace ()
     # Generate an error if the first file is missing
     <"$1"
 
-    # Sadly, we can't use `autom4te' tracing to extract macro arguments,
+    # Sadly, we can't use 'autom4te' tracing to extract macro arguments,
     # because it complains about things we want to ignore at bootstrap
     # time - like missing m4_include files; AC_PREREQ being newer than
     # the installed autoconf; and returns nothing when tracing
-    # `AM_INIT_AUTOMAKE' when aclocal hasn't been generated yet.
+    # 'AM_INIT_AUTOMAKE' when aclocal hasn't been generated yet.
     #
     # The following tries to emulate a less persnickety version of (and
     # due to not having to wait for Perl startup on every invocation,
@@ -2030,7 +2030,7 @@ func_extract_trace ()
     # it for reading Autoconf macros, while still providing some of the
     # functionality generally used at m4-time to supply dynamic
     # arguments to Autocof functions, but without following
-    # `m4_s?include' files.
+    # 'm4_s?include' files.
     _G_mini='
         # Initialisation.
         m4_changequote([,])
@@ -2116,7 +2116,7 @@ func_extract_trace ()
 # --------------------------------------------------
 # Exactly like func_extract_trace, except that only the first argument
 # to the first invocation of one of the comma separated MACRO_NAMES is
-# returned in `$func_extract_trace_first_result`.
+# returned in '$func_extract_trace_first_result'.
 func_extract_trace_first ()
 {
     $debug_cmd
@@ -2169,7 +2169,7 @@ on a separate line.'
 ## Actually perform the trace. ##
 ## --------------------------- ##
 
-# Only call `func_main' if this script was called directly.
+# Only call 'func_main' if this script was called directly.
 test extract-trace = "$progname" && func_main "$@"
 
 # Local variables:
@@ -2215,7 +2215,7 @@ scriptversion=2012-10-21.12; # UTC
 # files under version control, but running all of the right tools
 # with the right arguments, in the correct order to regenerate
 # all of those files in readiness for configuration and building
-# can be surprisingly involved!  Many projects have a `bootstrap'
+# can be surprisingly involved!  Many projects have a 'bootstrap'
 # script under version control to invoke Autotools and perform
 # other assorted book-keeping with version numbers and the like.
 #
@@ -2248,13 +2248,13 @@ scriptversion=2012-10-21.12; # UTC
 
 # All uppercase denotes values stored in the environment.  These
 # variables should generally be overridden by the user - however, we do
-# set them to `true' in some parts of this script to prevent them being
-# called at the wrong time by other tools that we call (`autoreconf',
+# set them to 'true' in some parts of this script to prevent them being
+# called at the wrong time by other tools that we call ('autoreconf',
 # for example).
 #
-# We also allow `LIBTOOLIZE', `M4', `SHA1SUM' and some others to be
+# We also allow 'LIBTOOLIZE', 'M4', 'SHA1SUM' and some others to be
 # overridden, and export the result for child processes, but they are
-# handled by the function `func_find_tool' and not defaulted in this
+# handled by the function 'func_find_tool' and not defaulted in this
 # section.
 
 : ${ACLOCAL="aclocal"}
@@ -2292,17 +2292,17 @@ export CONFIG_SHELL
 ## -------------- ##
 
 # A newline delimited list of triples of programs (that respond to
-# --version), the minimum version numbers required (or just `-' in the
+# --version), the minimum version numbers required (or just '-' in the
 # version field if any version will be sufficient) and homepage URLs
 # to help locate missing packages.
 buildreq=
 
 # Name of a file containing instructions on installing missing packages
-# required in `buildreq'.
+# required in 'buildreq'.
 buildreq_readme=README-hacking
 
 # These are extracted from AC_INIT in configure.ac, though you can
-# override those values in `bootstrap.conf' if you prefer.
+# override those values in 'bootstrap.conf' if you prefer.
 build_aux=
 macro_dir=
 package=
@@ -2310,9 +2310,9 @@ package_name=
 package_version=
 package_bugreport=
 
-# These are extracted from `gnulib-cache.m4', or else fall-back
+# These are extracted from 'gnulib-cache.m4', or else fall-back
 # automatically on the gnulib defaults; unless you set the values
-# manually in `bootstrap.conf'.
+# manually in 'bootstrap.conf'.
 doc_base=
 gnulib_mk=
 gnulib_name=
@@ -2320,8 +2320,8 @@ local_gl_dir=
 source_base=
 tests_base=
 
-# The list of gnulib modules required at `gnulib-tool' time.  If you
-# check `gnulib-cache.m4' into your repository, then this list will be
+# The list of gnulib modules required at 'gnulib-tool' time.  If you
+# check 'gnulib-cache.m4' into your repository, then this list will be
 # extracted automatically.
 gnulib_modules=
 
@@ -2374,7 +2374,7 @@ extra_locale_categories=
 # Additional xgettext options to use.  Gnulib might provide you with an
 # extensive list of additional options to append to this, but gettext
 # 0.16.1 and newer appends them automaticaly, so you can safely ignore
-# the complaints from `gnulib-tool' if your $configure_ac states:
+# the complaints from 'gnulib-tool' if your $configure_ac states:
 #
 #    AM_GNU_GETTEXT_VERSION([0.16.1])
 xgettext_options="
@@ -2393,8 +2393,8 @@ checkout_only_file=
 # the --copy option has no effect).
 copy=false
 
-# Set this to ".cvsignore .gitignore" in `bootstrap.conf' if you want
-# those files to be generated in directories like `lib/', `m4/', and `po/',
+# Set this to ".cvsignore .gitignore" in 'bootstrap.conf' if you want
+# those files to be generated in directories like 'lib/', 'm4/', and 'po/',
 # or set it to "auto" to make this script select which to use based
 # on which version control system (if any) is used in the source directory.
 # Or set it to "none" to ignore VCS ignore files entirely.  Default is
@@ -2406,15 +2406,15 @@ vc_ignore=
 ## Hookable functions. ##
 ## ------------------- ##
 
-# After `bootstrap.conf' has been sourced, execution proceeds by calling
-# `func_bootstrap'.  Wherever a function is decorated with
-# `func_hookable func_name', you will find a matching `func_run_hooks
-# func_name' which executes all functions added with `func_add_hook
+# After 'bootstrap.conf' has been sourced, execution proceeds by calling
+# 'func_bootstrap'.  Wherever a function is decorated with
+# 'func_hookable func_name', you will find a matching 'func_run_hooks
+# func_name' which executes all functions added with 'func_add_hook
 # func_name my_func'.
 #
 # You might notice that many of these functions begin with a series of
-# `$require_foo' lines.  See the docu-comments at the start of the
-# `Resource management' section for a description of what these are.
+# '$require_foo' lines.  See the docu-comments at the start of the
+# 'Resource management' section for a description of what these are.
 
 
 # func_bootstrap [ARG]...
@@ -2426,7 +2426,7 @@ func_bootstrap ()
     $debug_cmd
 
     # Save the current positional parameters to prevent them being
-    # corrupted by calls to `set' in `func_init'.
+    # corrupted by calls to 'set' in 'func_init'.
     func_quote_for_eval ${1+"$@"}
     _G_saved_positional_parameters=$func_quote_for_eval_result
 
@@ -2457,9 +2457,9 @@ func_bootstrap ()
 # func_init
 # ---------
 # Any early initialisations can be hooked to this function.  Consider
-# whether you can hook onto `func_prep' instead, because if you hook
+# whether you can hook onto 'func_prep' instead, because if you hook
 # any slow to execute code in here, it will also add to the time before
-# `./bootstrap --version' can respond.
+# './bootstrap --version' can respond.
 func_hookable func_init
 func_init ()
 {
@@ -2472,8 +2472,8 @@ func_init ()
 # func_prep
 # ---------
 # Function to perform preparation for remaining bootstrap process. If
-# your hooked code relies on the outcome of `func_options' hook it here
-# rather than to `func_init'.
+# your hooked code relies on the outcome of 'func_options' hook it here
+# rather than to 'func_init'.
 #
 # All the functions called inside func_prep are hookable. See the
 # individual implementations for details.
@@ -2523,18 +2523,18 @@ func_reconfigure ()
 {
     $debug_cmd
 
-    # Released `autopoint' has the tendency to install macros that have
-    # been obsoleted in current `gnulib., so run this before `gnulib-tool'.
+    # Released 'autopoint' has the tendency to install macros that have
+    # been obsoleted in current 'gnulib., so run this before 'gnulib-tool'.
     func_autopoint
 
-    # Autoreconf runs `aclocal' before `libtoolize', which causes spurious
-    # warnings if the initial `aclocal' is confused by the libtoolized
+    # Autoreconf runs 'aclocal' before 'libtoolize', which causes spurious
+    # warnings if the initial 'aclocal' is confused by the libtoolized
     # (or worse: out-of-date) macro directory.
     func_libtoolize
 
-    # If you need to do anything after `gnulib-tool' is done, but before
-    # `autoreconf' runs, you don't need to override this whole function,
-    # because `func_gnulib_tool' is hookable.
+    # If you need to do anything after 'gnulib-tool' is done, but before
+    # 'autoreconf' runs, you don't need to override this whole function,
+    # because 'func_gnulib_tool' is hookable.
     func_gnulib_tool
 
     func_autoreconf
@@ -2545,11 +2545,11 @@ func_reconfigure ()
 
 # func_gnulib_tool
 # ----------------
-# Run `gnulib-tool' to fetch gnulib modules into the current package.
+# Run 'gnulib-tool' to fetch gnulib modules into the current package.
 #
-# It's assumed that since you are using gnulib's `bootstrap' script,
+# It's assumed that since you are using gnulib's 'bootstrap' script,
 # you're also using gnulib elsewhere in your package.  If not, then
-# you can replace this function in `bootstrap.conf' with:
+# you can replace this function in 'bootstrap.conf' with:
 #
 #   func_gnulib_tool () { :; }
 #
@@ -2569,13 +2569,13 @@ func_gnulib_tool ()
         $require_build_aux
         $require_macro_dir
 
-        # Try not to pick up any stale values from `gnulib-cache.m4'.
+        # Try not to pick up any stale values from 'gnulib-cache.m4'.
         rm -f "$gnulib_cache"
 
         gnulib_mode=--import
 
-        # `gnulib_modules' and others are maintained in `bootstrap.conf`:
-        # Use `gnulib --import` to fetch gnulib modules.
+        # 'gnulib_modules' and others are maintained in 'bootstrap.conf':
+        # Use 'gnulib --import' to fetch gnulib modules.
         test -n "$build_aux" \
             && func_append_uniq gnulib_tool_options " --aux-dir=$build_aux"
         test -n "$macro_dir" \
@@ -2596,8 +2596,8 @@ func_gnulib_tool ()
         }
       else
 
-        # `gnulib_modules' and others are cached in `gnulib-cache.m4':
-        # Use `gnulib --update' to fetch gnulib modules.
+        # 'gnulib_modules' and others are cached in 'gnulib-cache.m4':
+        # Use 'gnulib --update' to fetch gnulib modules.
         gnulib_mode=--update
       fi
 
@@ -2623,7 +2623,7 @@ func_gnulib_tool ()
 
       func_show_eval "$gnulib_cmd" 'exit $?'
 
-      # Use `gnulib-tool --copy-file' to install non-module files.
+      # Use 'gnulib-tool --copy-file' to install non-module files.
       func_install_gnulib_non_module_files
     }
 
@@ -2703,14 +2703,14 @@ func_gettext_configuration ()
 ## Core functions. ##
 ## --------------- ##
 
-# This section contains the main functions called from the `Hookable
+# This section contains the main functions called from the 'Hookable
 # functions' (shown above), and are the ones you're  most likely
-# to want to replace with your own implementations in `bootstrap.conf'.
+# to want to replace with your own implementations in 'bootstrap.conf'.
 
 
 # func_autopoint
 # --------------
-# If this package uses gettext, then run `autopoint'.
+# If this package uses gettext, then run 'autopoint'.
 func_autopoint ()
 {
     $debug_cmd
@@ -2724,7 +2724,7 @@ func_autopoint ()
 
 # func_libtoolize
 # ---------------
-# If this package uses libtool, then run `libtoolize'.
+# If this package uses libtool, then run 'libtoolize'.
 func_libtoolize ()
 {
     $debug_cmd
@@ -2762,16 +2762,16 @@ func_gnulib_tool_copy_file ()
       # distribution tarball), make sure that at least we have some
       # version of the required file already in place.
       test -f "$2" || func_fatal_error "\
-Can't find, copy or download \`$2', a required
+Can't find, copy or download '$2', a required
 gnulib supplied file, please provide the location of a
-complete \`gnulib' tree by setting \`gnulib_path' in your
-\`bootstrap.conf' or with the \`--gnulib-srcdir' option -
-or else specify the location of your \`git' binary by
-setting \`GIT' in the environment so that a fresh
-\`gnulib' submodule can be cloned."
+complete 'gnulib' tree by setting 'gnulib_path' in your
+'bootstrap.conf' or with the '--gnulib-srcdir' option -
+or else specify the location of your 'git' binary by
+setting 'GIT' in the environment so that a fresh
+'gnulib' submodule can be cloned."
     else
       test -f "$gnulib_path/$1" || {
-        func_error "\`$gnulib_path/$1' does not exist"
+        func_error "'$gnulib_path/$1' does not exist"
         return 1
       }
 
@@ -2800,7 +2800,7 @@ func_install_gnulib_non_module_files ()
 	  build-aux/missing) dest=
             func_warning settings "\
 Please remove build-aux/missing from gnulib_module_files in
-\`bootstrap.conf', as it may clash with Automake's version."
+'bootstrap.conf', as it may clash with Automake's version."
             ;;
           build-aux/*) dest=$build_aux/`expr "$file" : 'build-aux/\(.*\)'`;;
           *) dest=$file;;
@@ -2835,7 +2835,7 @@ func_ensure_changelog ()
 ChangeLog is generated by gitlog-to-changelog.
 EOT
 
-    _G_message="creating dummy \`ChangeLog'"
+    _G_message="creating dummy 'ChangeLog'"
     test -f ChangeLog~ \
       && func_append _G_message ' (backup in ChangeLog~)'
     func_verbose "$_G_message"
@@ -2846,9 +2846,9 @@ EOT
 
 # func_autoreconf
 # ---------------
-# Being careful not to re-run `autopoint' or `libtoolize', and not to
-# try to run `autopoint', `libtoolize' or `autoheader' on packages that
-# don't use them, defer to `autoreconf' for execution of the remaining
+# Being careful not to re-run 'autopoint' or 'libtoolize', and not to
+# try to run 'autopoint', 'libtoolize' or 'autoheader' on packages that
+# don't use them, defer to 'autoreconf' for execution of the remaining
 # autotools to bootstrap this package.
 func_autoreconf ()
 {
@@ -2858,7 +2858,7 @@ func_autoreconf ()
     $require_build_aux  # automake and others put files in here
     $require_macro_dir  # aclocal and others put files in here
 
-    # We ran these manually already, and autoreconf won't exec `:'
+    # We ran these manually already, and autoreconf won't exec ':'
     save_AUTOPOINT=$AUTOPOINT; AUTOPOINT=true
     save_LIBTOOLIZE=$LIBTOOLIZE; LIBTOOLIZE=true
 
@@ -2884,10 +2884,10 @@ func_check_configuration ()
     $require_configure_ac
 
     eval 'test -n "$'$1'"' || {
-      _G_error_msg="please set \`$1' in \`bootstrap.conf'"
+      _G_error_msg="please set '$1' in 'bootstrap.conf'"
       if test -n "$configure_ac" && test -n "$2"; then
         func_append _G_error_msg "
-or add the following (or similar) to your \`$configure_ac':
+or add the following (or similar) to your '$configure_ac':
 $2"
       fi
 
@@ -2925,10 +2925,10 @@ func_clean_dangling_symlinks ()
 # ------------------------
 # Autopoint can result in over-zealously adding macros into $macro_dir
 # even though they are not actually used, for example tests to help
-# build the `intl' directory even though you have specified
-# `AM_GNU_GETTEXT([external])' in your configure.ac.  This function
+# build the 'intl' directory even though you have specified
+# 'AM_GNU_GETTEXT([external])' in your configure.ac.  This function
 # looks removes any macro files that can be found in gnulib,  but
-# are not `m4_include'd by `aclocal.m4'.
+# are not 'm4_include'd by 'aclocal.m4'.
 func_clean_unused_macros ()
 {
     $debug_cmd
@@ -2939,7 +2939,7 @@ func_clean_unused_macros ()
     test -n "$gnulib_path" && test -f aclocal.m4 && {
       aclocal_m4s=`find . -name aclocal.m4 -print`
 
-      # We use `ls|grep' instead of `ls *.m4' to avoid exceeding
+      # We use 'ls|grep' instead of 'ls *.m4' to avoid exceeding
       # command line length limits in some shells.
       for file in `cd "$macro_dir" && ls -1 |grep '\.m4$'`; do
 
@@ -2950,13 +2950,13 @@ func_clean_unused_macros ()
               # ...and there is an identical file in gnulib...
               if func_cmp_s "$gnulib_path/m4/$file" "$macro_dir/$file"; then
 
-                # ...and it's not in the precious list (`echo' is needed
+                # ...and it's not in the precious list ('echo' is needed
                 # here to squash whitespace for the match expression).
                 case " "`echo $gnulib_precious`" " in
                   *" $file "*) ;;
                   *) rm -f "$macro_dir/$file"
                      func_verbose \
-                       "removing unused gnulib file \`$macro_dir/$file'"
+                       "removing unused gnulib file '$macro_dir/$file'"
                 esac
               fi
         }
@@ -2967,8 +2967,8 @@ func_clean_unused_macros ()
 
 # func_skip_po_recommendation
 # ---------------------------
-# If there is a po directory, and `--skip-po' wasn't passed, let the
-# user know that they can use `--skip-po' on subsequent invocations.
+# If there is a po directory, and '--skip-po' wasn't passed, let the
+# user know that they can use '--skip-po' on subsequent invocations.
 func_skip_po_recommendation ()
 {
     $debug_cmd
@@ -2977,7 +2977,7 @@ func_skip_po_recommendation ()
         || $opt_skip_po \
         || func_warning recommend "\
 If your pofiles are up-to-date, you can rerun bootstrap
-as \`$progname --skip-po' to avoid redownloading."
+as '$progname --skip-po' to avoid redownloading."
 }
 
 
@@ -3011,9 +3011,9 @@ func_update_dotversion ()
 # particular resource (a file, or a non-empty configuration variable for
 # example) is available, and if appropriate to extract default values
 # from pertinent package files.  Where a variable already has a non-
-# empty value (as set by the package's `bootstrap.conf'), that value is
+# empty value (as set by the package's 'bootstrap.conf'), that value is
 # used in preference to deriving the default. Call them using their
-# associated `require_*' variable to ensure that they are executed, at
+# associated 'require_*' variable to ensure that they are executed, at
 # most, once.
 
 
@@ -3030,7 +3030,7 @@ func_require_checkout_only_file ()
       test -n "$checkout_only_file" && test ! -f "$checkout_only_file" \
           && func_fatal_error "\
 Bootstrapping from a non-checked-out distribution is risky.
-If you wish to bootstrap anyway, use the \`--force' option."
+If you wish to bootstrap anyway, use the '--force' option."
     }
 
     require_checkout_only_file=:
@@ -3039,8 +3039,8 @@ If you wish to bootstrap anyway, use the \`--force' option."
 
 # require_aclocal_amflags
 # -----------------------
-# Ensure `$aclocal_amflags' has a sensible default, extracted from
-# `Makefile.am' if necessary.
+# Ensure '$aclocal_amflags' has a sensible default, extracted from
+# 'Makefile.am' if necessary.
 require_aclocal_amflags=func_require_aclocal_amflags
 func_require_aclocal_amflags ()
 {
@@ -3140,10 +3140,10 @@ func_require_bootstrap_uptodate ()
     done
 
     if $_G_missing_bootstrap_sources; then
-      func_warning upgrade '
+      func_warning upgrade "\
 Please add bootstrap to your gnulib_modules list in
-`bootstrap.conf'\'', so that I can tell you when there are
-updates available.'
+'bootstrap.conf', so that I can tell you when there are
+updates available."
     else
       $build_aux/inline-source $build_aux/bootstrap.in > bootstrap.new
 
@@ -3151,16 +3151,16 @@ updates available.'
         rm -f bootstrap.new
 	func_verbose "bootstrap script up to date"
       else
-        func_warning upgrade '
+        func_warning upgrade "\
 An updated bootstrap script has been generated for you in
-`bootstrap.new'\''.  After you'\''ve verified that you want
+'bootstrap.new'.  After you've verified that you want
 the changes, you can update with:
-    cat bootstrap.new > '$progname'
-    ./'$progname'
+    cat bootstrap.new > $progname
+    ./$progname
 
 Or you can disable this check permanently by adding the
-following to `bootstrap.conf'\'':
-    require_bootstrap_uptodate=:'
+following to 'bootstrap.conf':
+    require_bootstrap_uptodate=:"
       fi
     fi
 
@@ -3170,7 +3170,7 @@ following to `bootstrap.conf'\'':
 
 # require_build_aux
 # -----------------
-# Ensure that `$build_aux' is set, and if it doesn't already point to an
+# Ensure that '$build_aux' is set, and if it doesn't already point to an
 # existing directory, create one.
 require_build_aux=func_require_build_aux
 func_require_build_aux ()
@@ -3218,7 +3218,7 @@ func_require_buildreq_autobuild ()
       test -n "$func_extract_trace_result" && {
         func_append buildreq 'autobuild - http://josefsson.org/autobuild/
 '
-        func_verbose "auto-adding \`autobuild' to build requirements"
+        func_verbose "auto-adding 'autobuild' to build requirements"
       }
     }
 
@@ -3231,7 +3231,7 @@ func_require_buildreq_autobuild ()
 # require_buildreq_libtoolize
 # ---------------------------
 # Try to find the minimum compatible version of autoconf/libtool
-# required to bootstrap successfully, and add it to `$buildreq'.
+# required to bootstrap successfully, and add it to '$buildreq'.
 for tool in autoconf libtoolize autopoint; do
   b=$tool
   v=require_buildreq_${tool}
@@ -3259,7 +3259,7 @@ for tool in autoconf libtoolize autopoint; do
             '$tool' $_G_version http://www.gnu.org/s/'$b'
 "
         func_verbose \
-            "auto-adding \`'$tool'-$_G_version'\'' to build requirements"
+            "auto-adding '\'$tool'-'$_G_version\'' to build requirements"
       }
     }
 
@@ -3272,7 +3272,7 @@ done
 # require_buildreq_automake
 # -------------------------
 # Try to find the minimum compatible version of automake required to
-# bootstrap successfully, and add it to `$buildreq'.
+# bootstrap successfully, and add it to '$buildreq'.
 require_buildreq_automake=func_require_buildreq_automake
 func_require_buildreq_automake ()
 {
@@ -3292,7 +3292,7 @@ func_require_buildreq_automake ()
             automake $automake_version http://www.gnu.org/s/automake
 "
         func_verbose \
-            "auto-adding \`automake-$automake_version' to build requirements"
+            "auto-adding 'automake-$automake_version' to build requirements"
       }
     }
 
@@ -3367,7 +3367,7 @@ $buildreq_readme explains how to obtain these prerequisite programs:
 
 # require_copyright_holder
 # ------------------------
-# Ensure there is a sensible non-empty default value in `$copyright_holder'.
+# Ensure there is a sensible non-empty default value in '$copyright_holder'.
 require_copyright_holder=func_require_copyright_holder
 func_require_copyright_holder ()
 {
@@ -3376,8 +3376,8 @@ func_require_copyright_holder ()
     test -n "$copyright_holder" || {
       copyright_holder='Free Software Foundation, Inc.'
       func_warning settings "\
-Please set copyright_holder explicitly in \`bootstrap.conf';
-defaulting to \`$copyright_holder'."
+Please set copyright_holder explicitly in 'bootstrap.conf';
+defaulting to '$copyright_holder'."
     }
 
     require_copyright_holder=:
@@ -3386,7 +3386,7 @@ defaulting to \`$copyright_holder'."
 
 # require_dotgitmodules
 # ---------------------
-# Ensure we have a `.gitmodules' file, with appropriate `gnulib' settings.
+# Ensure we have a '.gitmodules' file, with appropriate 'gnulib' settings.
 require_dotgitmodules=func_require_dotgitmodules
 func_require_dotgitmodules ()
 {
@@ -3401,7 +3401,7 @@ func_require_dotgitmodules ()
       test -n "$_G_path" || {
         $require_vc_ignore_files
 
-        func_verbose "creating \`.gitmodules'"
+        func_verbose "creating '.gitmodules'"
 
         # If the .gitmodules file doesn't exist, create it now, and mark
         # it as ignored for the VCS.
@@ -3425,14 +3425,14 @@ func_require_dotgitmodules ()
 
 # require_extra_locale_categories
 # -------------------------------
-# Ensure there is a default value in `$extra_locale_categories'
+# Ensure there is a default value in '$extra_locale_categories'
 require_extra_locale_categories=func_require_extra_locale_categories
 func_require_extra_locale_categories ()
 {
     $debug_cmd
 
     # Defaults to empty, so run with whatever value may have been set in
-    # `bootstrap.conf'.
+    # 'bootstrap.conf'.
     require_extra_locale_categories=:
 }
 
@@ -3461,7 +3461,7 @@ func_require_git ()
 
 # require_gnulib_cache
 # --------------------
-# Ensure there is a non-empty default for `$gnulib_cache', and that it
+# Ensure there is a non-empty default for '$gnulib_cache', and that it
 # names an existing file.
 require_gnulib_cache=func_require_gnulib_cache
 func_require_gnulib_cache ()
@@ -3473,7 +3473,7 @@ func_require_gnulib_cache ()
     test -n "$gnulib_cache" \
       || gnulib_cache=$macro_dir/gnulib-cache.m4
 
-    func_verbose "found \`$gnulib_cache'"
+    func_verbose "found '$gnulib_cache'"
 
     require_gnulib_cache=:
 }
@@ -3510,8 +3510,8 @@ func_require_gnulib_merge_changelog ()
 
 # require_gnulib_mk
 # -----------------
-# Ensure gnulib_mk has a sensible value, extracted from `gnulib-cache.m4'
-# if possible, otherwise letting `gnulib-tool' pick a default.
+# Ensure gnulib_mk has a sensible value, extracted from 'gnulib-cache.m4'
+# if possible, otherwise letting 'gnulib-tool' pick a default.
 require_gnulib_mk=func_require_gnulib_mk
 func_require_gnulib_mk ()
 {
@@ -3534,7 +3534,7 @@ func_require_gnulib_mk ()
 # require_gnulib_path
 # require_gnulib_url
 # -------------------
-# Ensure `gnulib_path' and `gnulib_url' are set.
+# Ensure 'gnulib_path' and 'gnulib_url' are set.
 require_gnulib_path=func_require_dotgitmodules_parameters
 require_gnulib_url=func_require_dotgitmodules_parameters
 func_require_dotgitmodules_parameters ()
@@ -3544,9 +3544,9 @@ func_require_dotgitmodules_parameters ()
     $require_git
 
     test true = "$GIT" && {
-      # If we can't find git (or if the user specified `--skip-git'),
+      # If we can't find git (or if the user specified '--skip-git'),
       # then use an existing gnulib directory specified with
-      # `--gnulib-srcdir' if possible.
+      # '--gnulib-srcdir' if possible.
       test -n "$gnulib_path" \
           || test ! -x "$opt_gnulib_srcdir/gnulib-tool" \
           || gnulib_path=$opt_gnulib_srcdir
@@ -3581,7 +3581,7 @@ func_require_dotgitmodules_parameters ()
 
 # require_gnulib_submodule
 # ------------------------
-# Ensure that there is a current gnulib submodule at `$gnulib_path'.
+# Ensure that there is a current gnulib submodule at '$gnulib_path'.
 require_gnulib_submodule=func_require_gnulib_submodule
 func_require_gnulib_submodule ()
 {
@@ -3591,7 +3591,7 @@ func_require_gnulib_submodule ()
 
     if test true = "$GIT"; then
       func_warning recommend \
-          "No \`git' found; imported gnulib modules may be outdated."
+          "No 'git' found; imported gnulib modules may be outdated."
     else
       $require_gnulib_path
       $require_gnulib_url
@@ -3636,8 +3636,8 @@ func_require_gnulib_submodule ()
 
 # require_gnulib_tool
 # -------------------
-# Ensure that `$gnulib_tool' is set, and points to an executable file,
-# or else fall back to using the binary `true' if the main gnulib
+# Ensure that '$gnulib_tool' is set, and points to an executable file,
+# or else fall back to using the binary 'true' if the main gnulib
 # files appear to have been imported already.
 require_gnulib_tool=func_require_gnulib_tool
 func_require_gnulib_tool ()
@@ -3655,11 +3655,11 @@ func_require_gnulib_tool ()
       test -x "$gnulib_tool" || {
         gnulib_tool=true
         func_warning recommend \
-            "No \`gnulib-tool' found; gnulib modules may be missing."
+            "No 'gnulib-tool' found; gnulib modules may be missing."
       }
 
       test true = "$gnulib_tool" \
-          || func_verbose "found \`$gnulib_tool'"
+          || func_verbose "found '$gnulib_tool'"
     }
 
     require_gnulib_tool=:
@@ -3675,8 +3675,8 @@ func_require_libtoolize ()
     $debug_cmd
 
     # Unless we're not searching for libtool use by this package, set
-    # LIBTOOLIZE to true if none of `LT_INIT', `AC_PROG_LIBTOOL' and
-    # `AM_PROG_LIBTOOL' are used in configure.
+    # LIBTOOLIZE to true if none of 'LT_INIT', 'AC_PROG_LIBTOOL' and
+    # 'AM_PROG_LIBTOOL' are used in configure.
     test true = "$LIBTOOLIZE" || {
       func_extract_trace LT_INIT
       test -n "$func_extract_trace_result" || func_extract_trace AC_PROG_LIBTOOL
@@ -3702,14 +3702,14 @@ func_require_libtoolize ()
 
 # require_macro_dir
 # -----------------
-# Ensure that `$macro_dir' is set, and if it doesn't already point to an
+# Ensure that '$macro_dir' is set, and if it doesn't already point to an
 # existing directory, create one.
 require_macro_dir=func_require_macro_dir
 func_require_macro_dir ()
 {
     $debug_cmd
 
-    # Sometimes this is stored in `configure.ac'.
+    # Sometimes this is stored in 'configure.ac'.
     test -n "$macro_dir" || {
       # AC_CONFIG_MACRO_DIRS takes a space delimited list of directories,
       # but we only care about the first one in bootstrap.
@@ -3721,7 +3721,7 @@ func_require_macro_dir ()
       macro_dir=$func_extract_trace_first_result
     }
 
-    # Otherwise we might find it in `Makefile.am'.
+    # Otherwise we might find it in 'Makefile.am'.
     test -n "$macro_dir" || {
       $require_aclocal_amflags
 
@@ -3758,7 +3758,7 @@ func_require_macro_dir ()
 
 # require_makefile_am
 # -------------------
-# Ensure there is a `Makefile.am' in the current directory.
+# Ensure there is a 'Makefile.am' in the current directory.
 # names an existing file.
 require_makefile_am=func_require_makefile_am
 func_require_makefile_am ()
@@ -3770,7 +3770,7 @@ func_require_makefile_am ()
 
     <"$makefile_am"
 
-    func_verbose "found \`$makefile_am'"
+    func_verbose "found '$makefile_am'"
 
     require_makefile_am=:
 }
@@ -3778,7 +3778,7 @@ func_require_makefile_am ()
 
 # require_package
 # ---------------
-# Ensure that `$package' contains a sensible default value.
+# Ensure that '$package' contains a sensible default value.
 require_package=func_require_package
 func_require_package ()
 {
@@ -3799,7 +3799,7 @@ func_require_package ()
 
 # require_package_bugreport
 # -------------------------
-# Ensure that this has a sensible value, extracted from `configure.ac'
+# Ensure that this has a sensible value, extracted from 'configure.ac'
 # if appropriate (and possible!).
 require_package_bugreport=func_require_package_bugreport
 func_require_package_bugreport ()
@@ -3825,7 +3825,7 @@ func_require_package_bugreport ()
 
 # require_package_name
 # --------------------
-# Ensure that this has a sensible value, extracted from `configure.ac'
+# Ensure that this has a sensible value, extracted from 'configure.ac'
 # if appropriate (and possible!).
 require_package_name=func_require_package_name
 func_require_package_name ()
@@ -3851,11 +3851,11 @@ func_require_package_name ()
 
 # require_package_version
 # -----------------------
-# Ensure that this has a sensible value, extracted from `configure.ac'
+# Ensure that this has a sensible value, extracted from 'configure.ac'
 # if appropriate (and possible!).  While we might have set all the
-# parameters extracted from AC_INIT at once, `package_version' in
+# parameters extracted from AC_INIT at once, 'package_version' in
 # particular is not necessarily available as early as the others, since
-# `git-version-gen' is often involved, and until then we can't rely on
+# 'git-version-gen' is often involved, and until then we can't rely on
 # getting a correct version number from an AC_INIT extraction.
 require_package_version=func_require_package_version
 func_require_package_version ()
@@ -3877,7 +3877,7 @@ func_require_package_version ()
 	*" git-version-gen "*)
 	  func_fatal_error "\
 cannot \$require_package_version in bootstrap.conf before
-func_gnulib_tool has installed the \`git-version-gen' script."
+func_gnulib_tool has installed the 'git-version-gen' script."
 	  ;;
 	*)
           func_check_configuration package_version \
@@ -3918,7 +3918,7 @@ func_require_patch ()
 # require_source_base
 # -------------------
 # Ensure that source_base has a sensible value, extracted from
-# `gnulib-cache.m4' if possible.
+# 'gnulib-cache.m4' if possible.
 require_source_base=func_require_source_base
 func_require_source_base ()
 {
@@ -3942,8 +3942,8 @@ func_require_source_base ()
 
 # require_vc_ignore_files
 # -----------------------
-# Ensure that `$vc_ignore' has been processed to list VCS ignore files
-# in `$vc_ignore_files'
+# Ensure that '$vc_ignore' has been processed to list VCS ignore files
+# in '$vc_ignore_files'
 require_vc_ignore_files=func_require_vc_ignore_files
 func_require_vc_ignore_files ()
 {
@@ -3969,7 +3969,7 @@ func_require_vc_ignore_files ()
 ## Helper functions. ##
 ## ------------------##
 
-# This section contains the helper functions used by the rest of `bootstrap'.
+# This section contains the helper functions used by the rest of 'bootstrap'.
 
 # func_len STRING
 # ---------------
@@ -3997,10 +3997,10 @@ fi
 # func_unset VAR
 # --------------
 # Portably unset VAR.
-# In some shells, an `unset VAR' statement leaves a non-zero return
+# In some shells, an 'unset VAR' statement leaves a non-zero return
 # status if VAR is already unset, which might be problematic if the
 # statement is used at the end of a function (thus poisoning its return
-# value) or when `set -e' is active (causing even a spurious abort of
+# value) or when 'set -e' is active (causing even a spurious abort of
 # the script in this case).
 func_unset ()
 {
@@ -4018,7 +4018,7 @@ func_cmp_s ()
     $debug_cmd
 
     # This function relies on non-zero exit status, which will cause the
-    # program to exit when running in `set -e' mode.
+    # program to exit when running in 'set -e' mode.
     $CMP "$@" >/dev/null 2>&1
 }
 
@@ -4032,7 +4032,7 @@ func_grep_q ()
     $debug_cmd
 
     # This function relies on non-zero exit status, which will cause the
-    # program to exit when running in `set -e' mode.
+    # program to exit when running in 'set -e' mode.
     $GREP "$@" >/dev/null 2>&1
 }
 
@@ -4131,9 +4131,9 @@ func_strrow ()
 # valued WIDTH arguments following INDENT.  The next set (i.e. a number
 # of arguments equal to the number of WIDTH arguments) of fields are
 # treated as the table's column HEADERs, and are separated from the
-# remainder of the table by an indented row of `-' characters. Remaining
+# remainder of the table by an indented row of '-' characters. Remaining
 # arguments are each aligned below the next available header, wrapping
-# to a new row as necessary.  Finally another row of `-' characters is
+# to a new row as necessary.  Finally another row of '-' characters is
 # added to mark the end of the table.
 #
 # For example an unindented 3 column table with 2 rows of data would be
@@ -4174,7 +4174,7 @@ func_strtable ()
     done
     func_strrow $_G_header
 
-    # Strip off the indent, and make a divider with `-' chars, then
+    # Strip off the indent, and make a divider with '-' chars, then
     # reindent.
     _G_divider=`$bs_echo "$func_strrow_result" \
         |$SED 's|[^ ]|-|g
@@ -4214,7 +4214,7 @@ func_internal_error ()
 {
     func_fatal_error "\
 INTERNAL: " ${1+"$@"} "
-          Please report this bug to \`bug-gnulib@gnu.org'
+          Please report this bug to 'bug-gnulib@gnu.org'
           in as much detail as possible."
 }
 
@@ -4227,7 +4227,7 @@ func_permissions_error ()
 {
     $debug_cmd
 
-    func_fatal_error "Failed to create \`$1', check permissions."
+    func_fatal_error "Failed to create '$1', check permissions."
 }
 
 
@@ -4310,7 +4310,7 @@ func_insert_sorted_if_absent ()
       test -f "$file" || touch "$file"
 
       func_grep_q "$str" "$file" \
-          && func_verbose "inserting \`$str' into \`$file'"
+          && func_verbose "inserting '$str' into '$file'"
 
       $bs_echo "$str" |sort -u - "$file" |func_cmp_s - "$file" \
         || $bs_echo "$str" |sort -u - "$file" -o "$file" \
@@ -4321,7 +4321,7 @@ func_insert_sorted_if_absent ()
 
 # func_sort_ver VER1 VER2
 # -----------------------
-# `sort -V' is not generally available.
+# 'sort -V' is not generally available.
 # Note this deviates from the version comparison in automake
 # in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
 # but this should suffice as we won't be specifying old
@@ -4425,11 +4425,11 @@ func_check_versions ()
       _G_instver=`func_get_version $_G_app`
 
       test -z "$_G_instver" \
-          || func_verbose "found \`$_G_app' version $_G_instver"
+          || func_verbose "found '$_G_app' version $_G_instver"
 
       # Fail if --version didn't work.
       if test -z "$_G_instver"; then
-        func_error "\`$_G_app' not found"
+        func_error "'$_G_app' not found"
         func_check_versions_result=false
 
       # Fail if a new version than what we have is required.
@@ -4437,8 +4437,8 @@ func_check_versions ()
         _G_newer=`func_sort_ver $_G_reqver $_G_instver |cut -d' ' -f2`
         test "$_G_newer" != "$_G_instver" && {
           func_error "\
-\`$_G_app' version == $_G_instver is too old
-\`$_G_app' version >= $_G_reqver is required"
+'$_G_app' version == $_G_instver is too old
+'$_G_app' version >= $_G_reqver is required"
           func_check_versions_result=false
         }
       fi
@@ -4527,9 +4527,9 @@ func_update_po_files ()
 
 usage='$progpath [OPTION]...'
 
-# Short help message in response to `-h'.  Add to this in `bootstrap.conf'
+# Short help message in response to '-h'.  Add to this in 'bootstrap.conf'
 # if you accept any additional options.
-usage_message='Common Bootstrap Options:
+usage_message="Common Bootstrap Options:
    -c, --copy         copy files instead of creating symbolic links.
        --debug        enable verbose shell tracing
    -n, --dry-run      print commands rather than running them
@@ -4538,10 +4538,10 @@ usage_message='Common Bootstrap Options:
        --gnulib-srcdir=DIRNAME
                       specify a local directory where gnulib sources
                       reside. Use this if you already have the gnulib
-                      sources on your machine, and don'\''t want to waste
+                      sources on your machine, and don't want to waste
                       your bandwidth downloading them again.  Defaults to
                       \$GNULIB_SRCDIR.
-       --no-warnings  equivalent to \`-Wnone'\''
+       --no-warnings  equivalent to '-Wnone'
        --skip-git     do not fetch files from remote repositories
        --skip-po      do not download po files.
    -v, --verbose      verbosely report processing
@@ -4549,15 +4549,15 @@ usage_message='Common Bootstrap Options:
    -W, --warnings=CATEGORY
                       report the warnings falling in CATEGORY [all]
    -h, --help         print short or long help message and exit
-'
+"
 
-# Additional text appended to `usage_message' in response to `--help'.
+# Additional text appended to 'usage_message' in response to '--help'.
 long_help_message=$long_help_message"
-       \`recommend'    show warnings about missing recommended packages
-       \`settings'     show warnings about missing \`$progname.conf' settings
-       \`upgrade'      show warnings about out-dated files
+       'recommend'    show warnings about missing recommended packages
+       'settings'     show warnings about missing '$progname.conf' settings
+       'upgrade'      show warnings about out-dated files
 
-If the file \`$progname.conf' exists in the same directory as this
+If the file '$progname.conf' exists in the same directory as this
 script, its contents are read as shell variables to configure the
 bootstrap.
 
@@ -4567,8 +4567,8 @@ For build prerequisites, environment variables like \$AUTOCONF and
 Running without arguments will suffice in most cases.
 "
 
-# Warning categories used by `bootstrap', append others if you use them
-# in your `bootstrap.conf'.
+# Warning categories used by 'bootstrap', append others if you use them
+# in your 'bootstrap.conf'.
 warning_categories='recommend settings upgrade'
 
 
@@ -4660,7 +4660,7 @@ func_add_hook func_validate_options bootstrap_validate_options
 
 
 ## -------------------------------------------------- ##
-## Source package customisations in `bootstrap.conf'. ##
+## Source package customisations in 'bootstrap.conf'. ##
 ## -------------------------------------------------- ##
 
 # Override the default configuration, if necessary.