maint: quote 'like this' or "like this", not `like this'

This is in response to a recent change in the GNU coding standards,
which now suggest quoting 'like this' or "like this", instead of
`like this' or ``like this''.
* HACKING, NEWS, README, README-hacking, TODO, doc/diagmeet.note:
* doc/diffutils.texi, ms/config.bat, ms/config.site:
* src/analyze.c, src/cmp.c, src/context.c, src/diff.c:
* src/diff.h, src/diff3.c, src/dir.c, src/ifdef.c, src/io.c:
* src/sdiff.c, src/side.c, src/system.h, src/util.c:
* tests/help-version:
Quote 'like this' or "like this" in commentary.
* cfg.mk (old_NEWS_hash): Adjust to reflect new NEWS quoting.
* man/help2man: Update to 1.40.4 version, with quoting fixed as above.
* po/en.po: Remove translation involving `, as it's no longer needed.
* src/cmp.c (try_help, specify_ignore_initial, usage, main):
* src/diff.c (main, try_help, option_help_msgid, specify_value)
(compare_files):
* src/diff3.c (main, try_help, option_help_msgid, usage)
(read_diff):
* src/dir.c (compare_names):
* src/sdiff.c (try_help, usage, check_child_status, main):
* src/util.c (finish_output):
* tests/help-version:
Quote 'like this' in output.

1 files changed, 6 insertions, 6 deletions

diff --git a/tests/help-version b/tests/help-version
index 8eb313a..bc9edce 100755
--- a/tests/help-version
+++ b/tests/help-version
@@ -74,7 +74,7 @@ test "x$v" = "x$VERSION" \
 for lang in C fr da; do
   for i in $built_programs; do
 
-    # Skip `test'; it doesn't accept --help or --version.
+    # Skip 'test'; it doesn't accept --help or --version.
     test $i = test && continue;
 
     # false fails even when invoked with --help or --version.
@@ -84,7 +84,7 @@ for lang in C fr da; do
       continue
     fi
 
-    # The just-built install executable is always named `ginstall'.
+    # The just-built install executable is always named 'ginstall'.
     test $i = install && i=ginstall
 
     # Make sure they exit successfully, under normal conditions.
@@ -95,7 +95,7 @@ for lang in C fr da; do
     grep "$PACKAGE_BUGREPORT" h-$i > /dev/null || fail=1
     rm -f h-$i
 
-    # Make sure they fail upon `disk full' error.
+    # Make sure they fail upon 'disk full' error.
     if test -w /dev/full && test -c /dev/full; then
       env $i --help    >/dev/full 2>/dev/null && fail=1
       env $i --version >/dev/full 2>/dev/null && fail=1
@@ -107,7 +107,7 @@ for lang in C fr da; do
         : # ok
       else
         fail=1
-        echo "*** $i: bad exit status \`$status' (expected $expected)," 1>&2
+        echo "*** $i: bad exit status '$status' (expected $expected)," 1>&2
         echo "  with --help or --version output redirected to /dev/full" 1>&2
       fi
     fi
@@ -139,7 +139,7 @@ chown_setup () { args=--version; }
 mkfifo_setup () { args=--version; }
 mknod_setup () { args=--version; }
 # Punt on uptime, since it fails (e.g., failing to get boot time)
-# on some systems, and we shouldn't let that stop `make check'.
+# on some systems, and we shouldn't let that stop 'make check'.
 uptime_setup () { args=--version; }
 
 # Create a file in the current directory, not in $TMPDIR.
@@ -187,7 +187,7 @@ basename_setup () { args=$tmp_in; }
 dirname_setup () { args=$tmp_in; }
 expr_setup () { args=foo; }
 
-# Punt, in case GNU `id' hasn't been installed yet.
+# Punt, in case GNU 'id' hasn't been installed yet.
 groups_setup () { args=--version; }
 
 pathchk_setup () { args=$tmp_in; }