diff options
| -rw-r--r-- | MANIFEST | 1 | ||||
| -rwxr-xr-x | Makefile.SH | 8 | ||||
| -rw-r--r-- | pod/.gitignore | 2 | ||||
| -rw-r--r-- | pod/perl.pod | 1 | ||||
| -rw-r--r-- | pod/perl5182delta.pod | 175 | ||||
| -rw-r--r-- | pod/perldelta.pod | 348 | ||||
| -rw-r--r-- | vms/descrip_mms.template | 2 | ||||
| -rw-r--r-- | win32/Makefile | 4 | ||||
| -rw-r--r-- | win32/makefile.mk | 4 | ||||
| -rw-r--r-- | win32/pod.mak | 4 |
10 files changed, 479 insertions, 70 deletions
@@ -4729,6 +4729,7 @@ pod/perl5162delta.pod Perl changes in version 5.16.2 pod/perl5163delta.pod Perl changes in version 5.16.3 pod/perl5180delta.pod Perl changes in version 5.18.0 pod/perl5181delta.pod Perl changes in version 5.18.1 +pod/perl5182delta.pod Perl changes in version 5.18.2 pod/perl561delta.pod Perl changes in version 5.6.1 pod/perl56delta.pod Perl changes in version 5.6 pod/perl581delta.pod Perl changes in version 5.8.1 diff --git a/Makefile.SH b/Makefile.SH index dcad8644cc..5eee4c6833 100755 --- a/Makefile.SH +++ b/Makefile.SH @@ -492,7 +492,7 @@ mini_obj = $(minindt_obj) $(MINIDTRACE_O) ndt_obj = $(obj0) $(obj1) $(obj2) $(obj3) $(ARCHOBJS) obj = $(ndt_obj) $(DTRACE_O) -perltoc_pod_prereqs = extra.pods pod/perl5182delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod +perltoc_pod_prereqs = extra.pods pod/perl5183delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod generated_pods = pod/perltoc.pod $(perltoc_pod_prereqs) generated_headers = uudmap.h bitcount.h mg_data.h @@ -1068,9 +1068,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST $(MINIPERL) $(Icwd) pod/perlmodlib.PL -q -pod/perl5182delta.pod: pod/perldelta.pod - $(RMS) pod/perl5182delta.pod - $(LNS) perldelta.pod pod/perl5182delta.pod +pod/perl5183delta.pod: pod/perldelta.pod + $(RMS) pod/perl5183delta.pod + $(LNS) perldelta.pod pod/perl5183delta.pod extra.pods: $(MINIPERL_EXE) -@test ! -f extra.pods || rm -f `cat extra.pods` diff --git a/pod/.gitignore b/pod/.gitignore index aa1cc77d39..5102663025 100644 --- a/pod/.gitignore +++ b/pod/.gitignore @@ -59,7 +59,7 @@ /roffitall # generated -/perl5182delta.pod +/perl5183delta.pod /perlapi.pod /perlintern.pod *.html diff --git a/pod/perl.pod b/pod/perl.pod index 08114befc4..b79169ee38 100644 --- a/pod/perl.pod +++ b/pod/perl.pod @@ -179,6 +179,7 @@ aux a2p c2ph h2ph h2xs perlbug pl2pm pod2html pod2man s2p splain xsubpp perlhist Perl history records perldelta Perl changes since previous version + perl5182delta Perl changes in version 5.18.2 perl5181delta Perl changes in version 5.18.1 perl5180delta Perl changes in version 5.18.0 perl5161delta Perl changes in version 5.16.1 diff --git a/pod/perl5182delta.pod b/pod/perl5182delta.pod new file mode 100644 index 0000000000..eacf81c792 --- /dev/null +++ b/pod/perl5182delta.pod @@ -0,0 +1,175 @@ +=encoding utf8 + +=head1 NAME + +perl5182delta - what is new for perl v5.18.2 + +=head1 DESCRIPTION + +This document describes differences between the 5.18.1 release and the 5.18.2 +release. + +If you are upgrading from an earlier release such as 5.18.0, first read +L<perl5181delta>, which describes differences between 5.18.0 and 5.18.1. + +=head1 Modules and Pragmata + +=head2 Updated Modules and Pragmata + +=over 4 + +=item * + +L<B> has been upgraded from version 1.42_01 to 1.42_02. + +The fix for [perl #118525] introduced a regression in the behaviour of +C<B::CV::GV>, changing the return value from a C<B::SPECIAL> object on +a C<NULL> C<CvGV> to C<undef>. C<B::CV::GV> again returns a +C<B::SPECIAL> object in this case. [perl #119413] + +=item * + +L<B::Concise> has been upgraded from version 0.95 to 0.95_01. + +This fixes a bug in dumping unexpected SPECIALs. + +=item * + +L<English> has been upgraded from version 1.06 to 1.06_01. This fixes an +error about the performance of C<$`>, C<$&>, and c<$'>. + +=item * + +L<File::Glob> has been upgraded from version 1.20 to 1.20_01. + +=back + +=head1 Documentation + +=head2 Changes to Existing Documentation + +=over 4 + +=item * + +L<perlrepository> has been restored with a pointer to more useful pages. + +=item * + +L<perlhack> has been updated with the latest changes from blead. + +=back + +=head1 Selected Bug Fixes + +=over 4 + +=item * + +Perl 5.18.1 introduced a regression along with a bugfix for lexical subs. +Some B::SPECIAL results from B::CV::GV became undefs instead. This broke +Devel::Cover among other libraries. This has been fixed. [perl #119351] + +=item * + +Perl 5.18.0 introduced a regression whereby C<[:^ascii:]>, if used in the same +character class as other qualifiers, would fail to match characters in the +Latin-1 block. This has been fixed. [perl #120799] + +=item * + +Perl 5.18.0 introduced a regression when using ->SUPER::method with AUTOLOAD +by looking up AUTOLOAD from the current package, rather than the current +package’s superclass. This has been fixed. [perl #120694] + +=item * + +Perl 5.18.0 introduced a regression whereby C<-bareword> was no longer +permitted under the C<strict> and C<integer> pragmata when used together. This +has been fixed. [perl #120288] + +=item * + +Previously PerlIOBase_dup didn't check if pushing the new layer succeeded +before (optionally) setting the utf8 flag. This could cause +segfaults-by-nullpointer. This has been fixed. + +=item * + +A buffer overflow with very long identifiers has been fixed. + +=item * + +A regression from 5.16 in the handling of padranges led to assertion failures +if a keyword plugin declined to handle the second ‘my’, but only after creating +a padop. + +This affected, at least, Devel::CallParser under threaded builds. + +This has been fixed + +=item * + +The construct C<< $r=qr/.../; /$r/p >> is now handled properly, an issue which +had been worsened by changes 5.18.0. [perl #118213] + +=back + +=head1 Acknowledgements + +Perl 5.18.2 represents approximately 3 months of development since Perl +5.18.1 and contains approximately 980 lines of changes across 39 files from 4 +authors. + +Perl continues to flourish into its third decade thanks to a vibrant +community of users and developers. The following people are known to have +contributed the improvements that became Perl 5.18.2: + +Craig A. Berry, David Mitchell, Ricardo Signes, Tony Cook. + +The list above is almost certainly incomplete as it is automatically +generated from version control history. In particular, it does not include +the names of the (very much appreciated) contributors who reported issues to +the Perl bug tracker. + +Many of the changes included in this version originated in the CPAN modules +included in Perl's core. We're grateful to the entire CPAN community for +helping Perl to flourish. + +For a more complete list of all of Perl's historical contributors, please see +the F<AUTHORS> file in the Perl source distribution. + +=head1 Reporting Bugs + +If you find what you think is a bug, you might check the articles recently +posted to the comp.lang.perl.misc newsgroup and the perl bug database at +http://rt.perl.org/perlbug/ . There may also be information at +http://www.perl.org/ , the Perl Home Page. + +If you believe you have an unreported bug, please run the L<perlbug> program +included with your release. Be sure to trim your bug down to a tiny but +sufficient test case. Your bug report, along with the output of C<perl -V>, +will be sent off to perlbug@perl.org to be analysed by the Perl porting team. + +If the bug you are reporting has security implications, which make it +inappropriate to send to a publicly archived mailing list, then please send it +to perl5-security-report@perl.org. This points to a closed subscription +unarchived mailing list, which includes all the core committers, who will be +able to help assess the impact of issues, figure out a resolution, and help +co-ordinate the release of patches to mitigate or fix the problem across all +platforms on which Perl is supported. Please only use this address for +security issues in the Perl core, not for modules independently distributed on +CPAN. + +=head1 SEE ALSO + +The F<Changes> file for an explanation of how to view exhaustive details on +what changed. + +The F<INSTALL> file for how to build Perl. + +The F<README> file for general stuff. + +The F<Artistic> and F<Copying> files for copyright information. + +=cut diff --git a/pod/perldelta.pod b/pod/perldelta.pod index d8b41a799c..c35462485f 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -2,142 +2,370 @@ =head1 NAME -perldelta - what is new for perl v5.18.2 +[ this is a template for a new perldelta file. Any text flagged as XXX needs +to be processed before release. ] + +perldelta - what is new for perl v5.18.3 =head1 DESCRIPTION -This document describes differences between the 5.18.1 release and the 5.18.2 +This document describes differences between the 5.18.2 release and the 5.18.3 release. -If you are upgrading from an earlier release such as 5.18.0, first read -L<perl5181delta>, which describes differences between 5.18.0 and 5.18.1. +If you are upgrading from an earlier release such as 5.18.1, first read +L<perl5182delta>, which describes differences between 5.18.1 and 5.18.2. -=head1 Modules and Pragmata +=head1 Notice -=head2 Updated Modules and Pragmata +XXX Any important notices here + +=head1 Core Enhancements + +XXX New core language features go here. Summarize user-visible core language +enhancements. Particularly prominent performance optimisations could go +here, but most should go in the L</Performance Enhancements> section. + +[ List each enhancement as a =head2 entry ] + +=head1 Security + +XXX Any security-related notices go here. In particular, any security +vulnerabilities closed should be noted here rather than in the +L</Selected Bug Fixes> section. + +[ List each security issue as a =head2 entry ] + +=head1 Incompatible Changes + +XXX For a release on a stable branch, this section aspires to be: + + There are no changes intentionally incompatible with 5.XXX.XXX + If any exist, they are bugs, and we request that you submit a + report. See L</Reporting Bugs> below. + +[ List each incompatible change as a =head2 entry ] + +=head1 Deprecations + +XXX Any deprecated features, syntax, modules etc. should be listed here. + +=head2 Module removals + +XXX Remove this section if inapplicable. + +The following modules will be removed from the core distribution in a future +release, and will at that time need to be installed from CPAN. Distributions +on CPAN which require these modules will need to list them as prerequisites. + +The core versions of these modules will now issue C<"deprecated">-category +warnings to alert you to this fact. To silence these deprecation warnings, +install the modules in question from CPAN. + +Note that these are (with rare exceptions) fine modules that you are encouraged +to continue to use. Their disinclusion from core primarily hinges on their +necessity to bootstrapping a fully functional, CPAN-capable Perl installation, +not usually on concerns over their design. + +=over + +=item XXX Note that deprecated modules should be listed here even if they are listed as an updated module in the L</Modules and Pragmata> section. + +=back + +[ List each other deprecation as a =head2 entry ] + +=head1 Performance Enhancements + +XXX Changes which enhance performance without changing behaviour go here. +There may well be none in a stable release. + +[ List each enhancement as a =item entry ] =over 4 =item * -L<B> has been upgraded from version 1.42_01 to 1.42_02. +XXX + +=back + +=head1 Modules and Pragmata -The fix for [perl #118525] introduced a regression in the behaviour of -C<B::CV::GV>, changing the return value from a C<B::SPECIAL> object on -a C<NULL> C<CvGV> to C<undef>. C<B::CV::GV> again returns a -C<B::SPECIAL> object in this case. [perl #119413] +XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/> +go here. If Module::CoreList is updated, generate an initial draft of the +following sections using F<Porting/corelist-perldelta.pl>, which prints stub +entries to STDOUT. Results can be pasted in place of the '=head2' entries +below. A paragraph summary for important changes should then be added by hand. +In an ideal world, dual-life modules would have a F<Changes> file that could be +cribbed. + +[ Within each section, list entries as a =item entry ] + +=head2 New Modules and Pragmata + +=over 4 =item * -L<B::Concise> has been upgraded from version 0.95 to 0.95_01. +XXX -This fixes a bug in dumping unexpected SPECIALs. +=back + +=head2 Updated Modules and Pragmata + +=over 4 =item * -L<English> has been upgraded from version 1.06 to 1.06_01. This fixes an -error about the performance of C<$`>, C<$&>, and c<$'>. +L<XXX> has been upgraded from version A.xx to B.yy. + +=back + +=head2 Removed Modules and Pragmata + +=over 4 =item * -L<File::Glob> has been upgraded from version 1.20 to 1.20_01. +XXX =back =head1 Documentation +XXX Changes to files in F<pod/> go here. Consider grouping entries by +file and be sure to link to the appropriate page, e.g. L<perlfunc>. + +=head2 New Documentation + +XXX Changes which create B<new> files in F<pod/> go here. + +=head3 L<XXX> + +XXX Description of the purpose of the new file here + =head2 Changes to Existing Documentation +XXX Changes which significantly change existing files in F<pod/> go here. +However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics> +section. + +=head3 L<XXX> + =over 4 =item * -L<perlrepository> has been restored with a pointer to more useful pages. +XXX Description of the change here + +=back + +=head1 Diagnostics + +The following additions or changes have been made to diagnostic output, +including warnings and fatal error messages. For the complete list of +diagnostic messages, see L<perldiag>. + +XXX New or changed warnings emitted by the core's C<C> code go here. Also +include any changes in L<perldiag> that reconcile it to the C<C> code. + +=head2 New Diagnostics + +XXX Newly added diagnostic messages go under here, separated into New Errors +and New Warnings + +=head3 New Errors + +=over 4 =item * -L<perlhack> has been updated with the latest changes from blead. +XXX L<message|perldiag/"message"> =back -=head1 Selected Bug Fixes +=head3 New Warnings =over 4 =item * -Perl 5.18.1 introduced a regression along with a bugfix for lexical subs. -Some B::SPECIAL results from B::CV::GV became undefs instead. This broke -Devel::Cover among other libraries. This has been fixed. [perl #119351] +XXX L<message|perldiag/"message"> -=item * +=back + +=head2 Changes to Existing Diagnostics -Perl 5.18.0 introduced a regression whereby C<[:^ascii:]>, if used in the same -character class as other qualifiers, would fail to match characters in the -Latin-1 block. This has been fixed. [perl #120799] +XXX Changes (i.e. rewording) of diagnostic messages go here + +=over 4 =item * -Perl 5.18.0 introduced a regression when using ->SUPER::method with AUTOLOAD -by looking up AUTOLOAD from the current package, rather than the current -package’s superclass. This has been fixed. [perl #120694] +XXX Describe change here + +=back + +=head1 Utility Changes + +XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. +Most of these are built within the directories F<utils> and F<x2p>. + +[ List utility changes as a =head3 entry for each utility and =item +entries for each change +Use L<XXX> with program names to get proper documentation linking. ] + +=head3 L<XXX> + +=over 4 =item * -Perl 5.18.0 introduced a regression whereby C<-bareword> was no longer -permitted under the C<strict> and C<integer> pragmata when used together. This -has been fixed. [perl #120288] +XXX + +=back + +=head1 Configuration and Compilation + +XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools +go here. Any other changes to the Perl build process should be listed here. +However, any platform-specific changes should be listed in the +L</Platform Support> section, instead. + +[ List changes as a =item entry ]. + +=over 4 =item * -Previously PerlIOBase_dup didn't check if pushing the new layer succeeded -before (optionally) setting the utf8 flag. This could cause -segfaults-by-nullpointer. This has been fixed. +XXX + +=back + +=head1 Testing + +XXX Any significant changes to the testing of a freshly built perl should be +listed here. Changes which create B<new> files in F<t/> go here as do any +large changes to the testing harness (e.g. when parallel testing was added). +Changes to existing files in F<t/> aren't worth summarizing, although the bugs +that they represent may be covered elsewhere. + +[ List each test improvement as a =item entry ] + +=over 4 =item * -A buffer overflow with very long identifiers has been fixed. +XXX + +=back + +=head1 Platform Support + +XXX Any changes to platform support should be listed in the sections below. + +[ Within the sections, list each platform as a =item entry with specific +changes as paragraphs below it. ] + +=head2 New Platforms + +XXX List any platforms that this version of perl compiles on, that previous +versions did not. These will either be enabled by new files in the F<hints/> +directories, or new subdirectories and F<README> files at the top level of the +source tree. + +=over 4 + +=item XXX-some-platform + +XXX + +=back + +=head2 Discontinued Platforms + +XXX List any platforms that this version of perl no longer compiles on. + +=over 4 + +=item XXX-some-platform + +XXX + +=back + +=head2 Platform-Specific Notes + +XXX List any changes for specific platforms. This could include configuration +and compilation changes or changes in portability/compatibility. However, +changes within modules for platforms should generally be listed in the +L</Modules and Pragmata> section. + +=over 4 + +=item XXX-some-platform + +XXX + +=back + +=head1 Internal Changes + +XXX Changes which affect the interface available to C<XS> code go here. Other +significant internal changes for future core maintainers should be noted as +well. + +[ List each change as a =item entry ] + +=over 4 =item * -A regression from 5.16 in the handling of padranges led to assertion failures -if a keyword plugin declined to handle the second ‘my’, but only after creating -a padop. +XXX + +=back + +=head1 Selected Bug Fixes -This affected, at least, Devel::CallParser under threaded builds. +XXX Important bug fixes in the core language are summarized here. Bug fixes in +files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>. -This has been fixed +[ List each fix as a =item entry ] + +=over 4 =item * -The construct C<< $r=qr/.../; /$r/p >> is now handled properly, an issue which -had been worsened by changes 5.18.0. [perl #118213] +XXX =back -=head1 Acknowledgements +=head1 Known Problems -Perl 5.18.2 represents approximately 3 months of development since Perl -5.18.1 and contains approximately 980 lines of changes across 39 files from 4 -authors. +XXX Descriptions of platform agnostic bugs we know we can't fix go here. Any +tests that had to be C<TODO>ed for the release would be noted here. Unfixed +platform specific bugs also go here. -Perl continues to flourish into its third decade thanks to a vibrant -community of users and developers. The following people are known to have -contributed the improvements that became Perl 5.18.2: +[ List each fix as a =item entry ] -Craig A. Berry, David Mitchell, Ricardo Signes, Tony Cook. +=over 4 -The list above is almost certainly incomplete as it is automatically -generated from version control history. In particular, it does not include -the names of the (very much appreciated) contributors who reported issues to -the Perl bug tracker. +=item * + +XXX + +=back + +=head1 Obituary + +XXX If any significant core contributor has died, we've added a short obituary +here. + +=head1 Acknowledgements -Many of the changes included in this version originated in the CPAN modules -included in Perl's core. We're grateful to the entire CPAN community for -helping Perl to flourish. +XXX Generate this with: -For a more complete list of all of Perl's historical contributors, please see -the F<AUTHORS> file in the Perl source distribution. + perl Porting/acknowledgements.pl v5.18.2..HEAD =head1 Reporting Bugs diff --git a/vms/descrip_mms.template b/vms/descrip_mms.template index dc6f62d5a4..ac177af3a7 100644 --- a/vms/descrip_mms.template +++ b/vms/descrip_mms.template @@ -326,7 +326,7 @@ x2p : [.x2p]$(DBG)a2p$(E) [.x2p]s2p.com [.x2p]find2perl.com extra.pods : miniperl @ @extra_pods.com -PERLDELTA_CURRENT = [.pod]perl5182delta.pod +PERLDELTA_CURRENT = [.pod]perl5183delta.pod $(PERLDELTA_CURRENT) : [.pod]perldelta.pod Copy/NoConfirm/Log $(MMS$SOURCE) $(PERLDELTA_CURRENT) diff --git a/win32/Makefile b/win32/Makefile index 01f4ec63e0..8c2daf958a 100644 --- a/win32/Makefile +++ b/win32/Makefile @@ -1158,7 +1158,7 @@ utils: $(PERLEXE) $(X2P) copy ..\README.tw ..\pod\perltw.pod copy ..\README.vos ..\pod\perlvos.pod copy ..\README.win32 ..\pod\perlwin32.pod - copy ..\pod\perldelta.pod ..\pod\perl5182delta.pod + copy ..\pod\perldelta.pod ..\pod\perl5183delta.pod cd ..\win32 $(PERLEXE) $(PL2BAT) $(UTILS) $(PERLEXE) $(ICWD) ..\autodoc.pl .. @@ -1251,7 +1251,7 @@ distclean: realclean -if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS -if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API -cd $(PODDIR) && del /f *.html *.bat roffitall \ - perl5182delta.pod perlaix.pod perlamiga.pod perlapi.pod \ + perl5183delta.pod perlaix.pod perlamiga.pod perlapi.pod \ perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \ perldgux.pod perldos.pod perlfreebsd.pod perlhaiku.pod \ perlhpux.pod perlhurd.pod perlintern.pod perlirix.pod \ diff --git a/win32/makefile.mk b/win32/makefile.mk index 9e6a57a6cd..864cd253f1 100644 --- a/win32/makefile.mk +++ b/win32/makefile.mk @@ -1338,7 +1338,7 @@ utils: $(PERLEXE) $(X2P) copy ..\README.tw ..\pod\perltw.pod copy ..\README.vos ..\pod\perlvos.pod copy ..\README.win32 ..\pod\perlwin32.pod - copy ..\pod\perldelta.pod ..\pod\perl5182delta.pod + copy ..\pod\perldelta.pod ..\pod\perl5183delta.pod $(PERLEXE) $(PL2BAT) $(UTILS) $(PERLEXE) $(ICWD) ..\autodoc.pl .. $(PERLEXE) $(ICWD) ..\pod\perlmodlib.pl -q @@ -1430,7 +1430,7 @@ distclean: realclean -if exist $(LIBDIR)\XS rmdir /s /q $(LIBDIR)\XS -if exist $(LIBDIR)\Win32API rmdir /s /q $(LIBDIR)\Win32API -cd $(PODDIR) && del /f *.html *.bat roffitall \ - perl5182delta.pod perlaix.pod perlamiga.pod perlapi.pod \ + perl5183delta.pod perlaix.pod perlamiga.pod perlapi.pod \ perlbs2000.pod perlce.pod perlcn.pod perlcygwin.pod \ perldgux.pod perldos.pod perlfreebsd.pod perlhaiku.pod \ perlhpux.pod perlhurd.pod perlintern.pod perlirix.pod \ diff --git a/win32/pod.mak b/win32/pod.mak index 050e4ad02b..49ee5f160c 100644 --- a/win32/pod.mak +++ b/win32/pod.mak @@ -36,6 +36,7 @@ POD = perl.pod \ perl5180delta.pod \ perl5181delta.pod \ perl5182delta.pod \ + perl5183delta.pod \ perl561delta.pod \ perl56delta.pod \ perl581delta.pod \ @@ -164,6 +165,7 @@ MAN = perl.man \ perl5180delta.man \ perl5181delta.man \ perl5182delta.man \ + perl5183delta.man \ perl561delta.man \ perl56delta.man \ perl581delta.man \ @@ -292,6 +294,7 @@ HTML = perl.html \ perl5180delta.html \ perl5181delta.html \ perl5182delta.html \ + perl5183delta.html \ perl561delta.html \ perl56delta.html \ perl581delta.html \ @@ -420,6 +423,7 @@ TEX = perl.tex \ perl5180delta.tex \ perl5181delta.tex \ perl5182delta.tex \ + perl5183delta.tex \ perl561delta.tex \ perl56delta.tex \ perl581delta.tex \ |