kc3-lang/automake/doc/help2man

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• Hash : 9322f409
  Author :
  Date : 2017-08-08T23:55:29
  

  doc: Update to latest help2man
  
  This fixes bug#27773.
  
  * doc/help2man: Sync with version 1.47.3 to support reproducible
  builds by using $SOURCE_DATE_EPOCH.
  

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• doc/help2man

• #!/usr/bin/perl -w
  
  # Generate a short man page from --help and --version output.
  # Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2009,
  # 2010, 2011, 2012, 2013, 2014, 2015 Free Software Foundation, Inc.
  
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU General Public License as published by
  # the Free Software Foundation; either version 3, or (at your option)
  # any later version.
  
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  
  # You should have received a copy of the GNU General Public License
  # along with this program; if not, see <http://www.gnu.org/licenses/>.
  
  # Written by Brendan O'Dea <bod@debian.org>
  # Available from ftp://ftp.gnu.org/gnu/help2man/
  
  use 5.008;
  use strict;
  use Getopt::Long;
  use Text::ParseWords qw(shellwords);
  use Text::Tabs qw(expand);
  use POSIX qw(strftime setlocale LC_ALL);
  
  my $this_program = 'help2man';
  my $this_version = '1.47.4';
  
  sub _ { $_[0] }
  sub configure_locale
  {
      my $locale = shift;
      die "$this_program: no locale support (Locale::gettext required)\n"
  	unless $locale eq 'C';
  }
  
  sub dec { $_[0] }
  sub enc { $_[0] }
  sub enc_user { $_[0] }
  sub kark { die +(sprintf shift, @_), "\n" }
  sub N_ { $_[0] }
  
  sub program_basename;
  sub get_option_value;
  sub convert_option;
  sub fix_italic_spacing;
  
  my $version_info = enc_user sprintf _(<<'EOT'), $this_program, $this_version;
  GNU %s %s
  
  Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2009, 2010,
  2011, 2012, 2013, 2014, 2015 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  
  Written by Brendan O'Dea <bod@debian.org>
  EOT
  
  my $help_info = enc_user sprintf _(<<'EOT'), $this_program, $this_program;
  `%s' generates a man page out of `--help' and `--version' output.
  
  Usage: %s [OPTION]... EXECUTABLE
  
   -n, --name=STRING       description for the NAME paragraph
   -s, --section=SECTION   section number for manual page (1, 6, 8)
   -m, --manual=TEXT       name of manual (User Commands, ...)
   -S, --source=TEXT       source of program (FSF, Debian, ...)
   -L, --locale=STRING     select locale (default "C")
   -i, --include=FILE      include material from `FILE'
   -I, --opt-include=FILE  include material from `FILE' if it exists
   -o, --output=FILE       send output to `FILE'
   -p, --info-page=TEXT    name of Texinfo manual
   -N, --no-info           suppress pointer to Texinfo manual
   -l, --libtool           exclude the `lt-' from the program name
       --help              print this help, then exit
       --version           print version number, then exit
  
  EXECUTABLE should accept `--help' and `--version' options and produce output on
  stdout although alternatives may be specified using:
  
   -h, --help-option=STRING     help option string
   -v, --version-option=STRING  version option string
   --version-string=STRING      version string
   --no-discard-stderr          include stderr when parsing option output
  
  Report bugs to <bug-help2man@gnu.org>.
  EOT
  
  my $section = 1;
  my $manual = '';
  my $source = '';
  my $help_option = '--help';
  my $version_option = '--version';
  my $discard_stderr = 1;
  my ($opt_name, @opt_include, $opt_output, $opt_info, $opt_no_info, $opt_libtool,
      $version_text);
  
  my %opt_def = (
      'n|name=s'		 => \$opt_name,
      's|section=s'	 => \$section,
      'm|manual=s'	 => \$manual,
      'S|source=s'	 => \$source,
      'L|locale=s'	 => sub { configure_locale pop },
      'i|include=s'	 => sub { push @opt_include, [ pop, 1 ] },
      'I|opt-include=s'	 => sub { push @opt_include, [ pop, 0 ] },
      'o|output=s'	 => \$opt_output,
      'p|info-page=s'	 => \$opt_info,
      'N|no-info'		 => \$opt_no_info,
      'l|libtool'		 => \$opt_libtool,
      'help'		 => sub { print $help_info; exit },
      'version'		 => sub { print $version_info; exit },
      'h|help-option=s'	 => \$help_option,
      'v|version-option=s' => \$version_option,
      'version-string=s'	 => \$version_text,
      'discard-stderr!'	 => \$discard_stderr,
  );
  
  # Parse options.
  Getopt::Long::config('bundling');
  die $help_info unless GetOptions %opt_def and @ARGV == 1;
  
  my %include = ();
  my %replace = ();
  my %append = ();
  my %append_match = ();
  my @sections = ();  # retain order of include file or in-line *section*s
  
  # Process include file (if given).  Format is:
  #
  #   Optional initial text, ignored.  May include lines starting with `-'
  #   which are processed as options.
  #
  #   [section]
  #   Verbatim text to be included in the named section.  By default at
  #   the start, but in the case of `name' and `synopsis' the content
  #   will replace the autogenerated contents.
  #
  #   [<section]
  #   Verbatim text to be inserted at the start of the named section.
  #
  #   [=section]
  #   Verbatim text to replace the named section.
  #
  #   [>section]
  #   Verbatim text to be appended to the end of the named section.
  #
  #   /pattern/
  #   Verbatim text for inclusion below a paragraph matching `pattern'.
  #
  
  while (@opt_include)
  {
      my ($inc, $required) = @{shift @opt_include};
  
      next unless -f $inc or $required;
      kark N_("%s: can't open `%s' (%s)"), $this_program, $inc, $!
  	unless open INC, $inc;
  
      my $key;
      my $hash;
  
      while (<INC>)
      {
  	# Convert input to internal Perl format, so that multibyte
  	# sequences are treated as single characters.
  	$_ = dec $_;
  
  	# [section]
  	if (/^\[([^]]+)\]\s*$/)
  	{
  	    $key = uc $1;
  	    $key =~ s/^\s+//;
  	    $key =~ s/\s+$//;
  	    $hash = \%include;
  	    # Handle explicit [<section], [=section] and [>section]
  	    if ($key =~ s/^([<>=])\s*//)
  	    {
  		if    ($1 eq '>') { $hash = \%append; }
  		elsif ($1 eq '=') { $hash = \%replace; }
  	    }
  	    # NAME/SYNOPSIS replace by default
  	    elsif ($key eq _('NAME') or $key eq _('SYNOPSIS'))
  	    {
  		$hash = \%replace;
  	    }
  	    else
  	    {
  		$hash = \%include;
  	    }
  
  	    push @sections, $key;
  	    next;
  	}
  
  	# /pattern/
  	if (m!^/(.*)/([ims]*)\s*$!)
  	{
  	    my $pat = $2 ? "(?$2)$1" : $1;
  
  	    # Check pattern.
  	    eval { $key = qr($pat) };
  	    if ($@)
  	    {
  		$@ =~ s/ at .*? line \d.*//;
  		die "$inc:$.:$@";
  	    }
  
  	    $hash = \%append_match;
  	    next;
  	}
  
  	# Check for options before the first section--anything else is
  	# silently ignored, allowing the first for comments and
  	# revision info.
  	unless ($key)
  	{
  	    # handle options
  	    if (/^-/)
  	    {
  		local @ARGV = shellwords $_;
  		GetOptions %opt_def;
  	    }
  
  	    next;
  	}
  
  	$hash->{$key} .= $_;
      }
  
      close INC;
  
      kark N_("%s: no valid information found in `%s'"), $this_program, $inc
  	unless $key;
  }
  
  # Compress trailing blank lines.
  for my $hash (\(%include, %replace, %append, %append_match))
  {
      for (keys %$hash) { $hash->{$_} =~ s/\n+$/\n/ }
  }
  
  # Grab help and version info from executable.
  my $help_text   = get_option_value $ARGV[0], $help_option;
  $version_text ||= get_option_value $ARGV[0], $version_option;
  
  # By default the generated manual pages will include the current date.  This may
  # however be overriden by setting the environment variable $SOURCE_DATE_EPOCH
  # to an integer value of the seconds since the UNIX epoch.  This is primarily
  # intended to support reproducible builds (wiki.debian.org/ReproducibleBuilds)
  # and will additionally ensure that the output date string is UTC.
  my $epoch_secs = time;
  if (exists $ENV{SOURCE_DATE_EPOCH} and $ENV{SOURCE_DATE_EPOCH} =~ /^(\d+)$/)
  {
      $epoch_secs = $1;
      $ENV{TZ} = 'UTC';
  }
  
  # Translators: the following message is a strftime(3) format string, which in
  # the English version expands to the month as a word and the full year.  It
  # is used on the footer of the generated manual pages.  If in doubt, you may
  # just use %x as the value (which should be the full locale-specific date).
  my $date = enc strftime _("%B %Y"), localtime $epoch_secs;
  my $program = program_basename $ARGV[0];
  my $package = $program;
  my $version;
  
  if ($opt_output)
  {
      unlink $opt_output or kark N_("%s: can't unlink %s (%s)"),
  	$this_program, $opt_output, $! if -e $opt_output;
  
      open STDOUT, ">$opt_output"
  	or kark N_("%s: can't create %s (%s)"), $this_program, $opt_output, $!;
  }
  
  # The first line of the --version information is assumed to be in one
  # of the following formats:
  #
  #   <version>
  #   <program> <version>
  #   {GNU,Free} <program> <version>
  #   <program> ({GNU,Free} <package>) <version>
  #   <program> - {GNU,Free} <package> <version>
  #
  # and separated from any copyright/author details by a blank line.
  
  ($_, $version_text) = ((split /\n+/, $version_text, 2), '');
  
  if (/^(\S+) +\(((?:GNU|Free) +[^)]+)\) +(.*)/ or
      /^(\S+) +- *((?:GNU|Free) +\S+) +(.*)/)
  {
      $program = program_basename $1;
      $package = $2;
      $version = $3;
  }
  elsif (/^((?:GNU|Free) +)?(\S+) +(.*)/)
  {
      $program = program_basename $2;
      $package = $1 ? "$1$program" : $program;
      $version = $3;
  }
  else
  {
      $version = $_;
  }
  
  # No info for `info' itself.
  $opt_no_info = 1 if $program eq 'info';
  
  if ($opt_name)
  {
      # --name overrides --include contents.
      $replace{_('NAME')} = "$program \\- $opt_name\n";
  }
  
  # Translators: "NAME", "SYNOPSIS" and other one or two word strings in all
  # upper case are manual page section headings.  The man(1) manual page in your
  # language, if available should provide the conventional translations.
  for ($replace{_('NAME')} || ($include{_('NAME')} ||= ''))
  {
      if ($_) # Use first name given as $program
      {
  	$program = $1 if /^([^\s,]+)(?:,?\s*[^\s,\\-]+)*\s+\\?-/;
      }
      else # Set a default (useless) NAME paragraph.
      {
  	$_ = sprintf _("%s \\- manual page for %s %s") . "\n", $program,
  	    $program, $version;
      }
  }
  
  # Man pages traditionally have the page title in caps.
  my $PROGRAM = uc $program;
  
  # Set default page head/footers
  $source ||= "$program $version";
  unless ($manual)
  {
      for ($section)
      {
  	if (/^(1[Mm]|8)/) { $manual = enc _('System Administration Utilities') }
  	elsif (/^6/)	  { $manual = enc _('Games') }
  	else		  { $manual = enc _('User Commands') }
      }
  }
  
  # Extract usage clause(s) [if any] for SYNOPSIS.
  # Translators: "Usage" and "or" here are patterns (regular expressions) which
  # are used to match the usage synopsis in program output.  An example from cp
  # (GNU coreutils) which contains both strings:
  #  Usage: cp [OPTION]... [-T] SOURCE DEST
  #    or:  cp [OPTION]... SOURCE... DIRECTORY
  #    or:  cp [OPTION]... -t DIRECTORY SOURCE...
  my $PAT_USAGE = _('Usage');
  my $PAT_USAGE_CONT = _('or');
  if ($help_text =~ s/^($PAT_USAGE):( +(\S+))(.*)((?:\n(?: {6}\1| *($PAT_USAGE_CONT): +\S).*)*)//om)
  {
      my @syn = $3 . $4;
  
      if ($_ = $5)
      {
  	s/^\n//;
  	for (split /\n/) { s/^ *(($PAT_USAGE_CONT): +)?//o; push @syn, $_ }
      }
  
      my $synopsis = '';
      for (@syn)
      {
  	$synopsis .= ".br\n" if $synopsis;
  	s!^\S*/!!;
  	s/^lt-// if $opt_libtool;
  	s/^(\S+) *//;
  	$synopsis .= ".B $1\n";
  	s/\s+$//;
  	s/(([][]|\.\.+)+)/\\fR$1\\fI/g;
  	s/^/\\fI/ unless s/^\\fR//;
  	$_ .= '\fR';
  	s/(\\fI)( *)/$2$1/g;
  	s/\\fI\\fR//g;
  	s/^\\fR//;
  	s/\\fI$//;
  	s/^\./\\&./;
  
  	$_ = fix_italic_spacing $_;
  	$synopsis .= "$_\n";
      }
  
      $include{_('SYNOPSIS')} .= $synopsis;
  }
  
  # Process text, initial section is DESCRIPTION.
  my $sect = _('DESCRIPTION');
  $_ = "$help_text\n\n$version_text";
  
  # Normalise paragraph breaks.
  s/^\n+//;
  s/\n*$/\n/;
  s/\n\n+/\n\n/g;
  
  # Join hyphenated lines.
  s/([A-Za-z])-\n *([A-Za-z])/$1$2/g;
  
  # Temporarily exchange leading dots, apostrophes and backslashes for
  # tokens.
  s/^\./\x80/mg;
  s/^'/\x81/mg;
  s/\\/\x82/g;
  
  # Translators: patterns are used to match common program output. In the source
  # these strings are all of the form of "my $PAT_something = _('...');" and are
  # regular expressions.  If there is more than one commonly used string, you
  # may separate alternatives with "|".  Spaces in these expressions are written
  # as " +" to indicate that more than one space may be matched.  The string
  # "(?:[\\w-]+ +)?" in the bug reporting pattern is used to indicate an
  # optional word, so that either "Report bugs" or "Report _program_ bugs" will
  # be matched.
  my $PAT_BUGS          = _('Report +(?:[\w-]+ +)?bugs|Email +bug +reports +to');
  my $PAT_AUTHOR        = _('Written +by');
  my $PAT_OPTIONS       = _('Options');
  my $PAT_ENVIRONMENT   = _('Environment');
  my $PAT_FILES         = _('Files');
  my $PAT_EXAMPLES      = _('Examples');
  my $PAT_FREE_SOFTWARE = _('This +is +free +software');
  
  # Start a new paragraph (if required) for these.
  s/([^\n])\n($PAT_BUGS|$PAT_AUTHOR) /$1\n\n$2 /og;
  
  # Convert iso-8859-1 copyright symbol or (c) to nroff
  # character.
  s/^Copyright +(?:\xa9|\([Cc]\))/Copyright \\(co/mg;
  
  while (length)
  {
      # Convert some standard paragraph names.
      if (s/^($PAT_OPTIONS): *\n+//o)
      {
  	$sect = _('OPTIONS');
  	next;
      }
      if (s/^($PAT_ENVIRONMENT): *\n+//o)
      {
  	$sect = _('ENVIRONMENT');
  	next;
      }
      if (s/^($PAT_FILES): *\n+//o)
      {
  	$sect = _('FILES');
  	next;
      }
      elsif (s/^($PAT_EXAMPLES): *\n+//o)
      {
  	$sect = _('EXAMPLES');
  	next;
      }
  
      # Custom section indicated by a line containing "*Section Name*".
      if (s/^\*(\w(.*\w)?)\* *\n+//)
      {
  	$sect = uc $1;
  	$sect =~ tr/*/ /;  # also accept *Section*Name*
  	push @sections, $sect;
  	next;
      }
  
      # Copyright section.
      if (/^Copyright /)
      {
  	$sect = _('COPYRIGHT');
      }
  
      # Bug reporting section.
      elsif (/^($PAT_BUGS) /o)
      {
  	$sect = _('REPORTING BUGS');
      }
  
      # Author section.
      elsif (/^($PAT_AUTHOR)/o)
      {
  	$sect = _('AUTHOR');
      }
  
      # Examples, indicated by an indented leading $, % or > are
      # rendered in a constant width font.
      if (/^( +)([\$\%>] )\S/)
      {
  	my $indent = $1;
  	my $prefix = $2;
  	my $break = '.IP';
  	while (s/^$indent\Q$prefix\E(\S.*)\n*//)
  	{
  	    $include{$sect} .= "$break\n\\f(CW$prefix$1\\fR\n";
  	    $break = '.br';
  	}
  
  	next;
      }
  
      my $matched = '';
  
      # Sub-sections have a trailing colon and the second line indented.
      if (s/^(\S.*:) *\n / /)
      {
  	$matched .= $& if %append_match;
  	$include{$sect} .= qq(.SS "$1"\n);
      }
  
      my $indent = 0;
      my $content = '';
  
      # Option with description.
      if (s/^( {1,10}([+-]\S.*?))(?:(  +(?!-))|\n( {20,}))(\S.*)\n//)
      {
  	$matched .= $& if %append_match;
  	$indent = length ($4 || "$1$3");
  	$content = ".TP\n\x84$2\n\x84$5\n";
  	unless ($4)
  	{
  	    # Indent may be different on second line.
  	    $indent = length $& if /^ {20,}/;
  	}
      }
  
      # Option without description.
      elsif (s/^ {1,10}([+-]\S.*)\n//)
      {
  	$matched .= $& if %append_match;
  	$content = ".HP\n\x84$1\n";
  	$indent = 80; # not continued
      }
  
      # Indented paragraph with tag.
      elsif (s/^( +(\S.*?))(?:(  +)|\n( {20,}))(\S.*)\n//)
      {
  	$matched .= $& if %append_match;
  	$indent = length ($4 || "$1$3");
  	$content = ".TP\n\x84$2\n\x84$5\n";
      }
  
      # Indented paragraph.
      elsif (s/^( +)(\S.*)\n//)
      {
  	$matched .= $& if %append_match;
  	$indent = length $1;
  	$content = ".IP\n\x84$2\n";
      }
  
      # Left justified paragraph.
      else
      {
  	s/(.*)\n//;
  	$matched .= $& if %append_match;
  	$content = ".PP\n" if $include{$sect};
  	$content .= "$1\n";
      }
  
      # Append continuations.
      while ($indent ? s/^ {$indent}(\S.*)\n// : s/^(\S.*)\n//)
      {
  	$matched .= $& if %append_match;
  	$content .= "\x84$1\n";
      }
  
      # Move to next paragraph.
      s/^\n+//;
  
      for ($content)
      {
  	# Leading dot and apostrophe protection.
  	s/\x84\./\x80/g;
  	s/\x84'/\x81/g;
  	s/\x84//g;
  
  	# Examples should be verbatim.
  	unless ($sect eq _('EXAMPLES'))
  	{
  	    # Convert options.
  	    s/(^|[ (])(-[][\w=-]+)/$1 . convert_option $2/mge;
  
  	    # Italicise filenames: /a/b, $VAR/c/d, ~/e/f
  	    s!
  		(^|[ (])			# space/punctuation before
  		(
  		    (?:\$\w+|~)?		# leading variable, or tilde
  		    (?:/\w(?:[\w.-]*\w)?)+	# path components
  		)
  		($|[ ,;.)])			# space/punctuation after
  	    !$1\\fI$2\\fP$3!xmg;
  
  	    $_ = fix_italic_spacing $_;
  	}
  
  	# Escape remaining hyphens.
  	s/-/\x83/g;
  
  	if ($sect eq _('COPYRIGHT'))
  	{
  	    # Insert line breaks before additional copyright messages
  	    # and the disclaimer.
  	    s/\n(Copyright |$PAT_FREE_SOFTWARE)/\n.br\n$1/og;
  	}
  	elsif ($sect eq _('REPORTING BUGS'))
  	{
  	    # Handle multi-line bug reporting sections of the form:
  	    #
  	    #   Report <program> bugs to <addr>
  	    #   GNU <package> home page: <url>
  	    #   ...
  	    s/\n([[:upper:]])/\n.br\n$1/g;
  	}
      }
  
      # Check if matched paragraph contains /pat/.
      if (%append_match)
      {
  	for my $pat (keys %append_match)
  	{
  	    if ($matched =~ $pat)
  	    {
  		$content .= ".PP\n" unless $append_match{$pat} =~ /^\./;
  		$content .= $append_match{$pat};
  	    }
  	}
      }
  
      $include{$sect} .= $content;
  }
  
  # Refer to the real documentation.
  unless ($opt_no_info)
  {
      my $info_page = $opt_info || $program;
  
      $sect = _('SEE ALSO');
      $include{$sect} .= ".PP\n" if $include{$sect};
      $include{$sect} .= sprintf _(<<'EOT'), $program, $program, $info_page;
  The full documentation for
  .B %s
  is maintained as a Texinfo manual.  If the
  .B info
  and
  .B %s
  programs are properly installed at your site, the command
  .IP
  .B info %s
  .PP
  should give you access to the complete manual.
  EOT
  }
  
  # Append additional text.
  while (my ($sect, $text) = each %append)
  {
      $include{$sect} .= $append{$sect};
  }
  
  # Replace sections.
  while (my ($sect, $text) = each %replace)
  {
      $include{$sect} = $replace{$sect};
  }
  
  # Output header.
  print <<EOT;
  .\\" DO NOT MODIFY THIS FILE!  It was generated by $this_program $this_version.
  .TH $PROGRAM "$section" "$date" "$source" "$manual"
  EOT
  
  # Section ordering.
  my @pre = (_('NAME'), _('SYNOPSIS'), _('DESCRIPTION'), _('OPTIONS'));
  my @post = (_('ENVIRONMENT'), _('FILES'), _('EXAMPLES'), _('AUTHOR'),
      _('REPORTING BUGS'), _('COPYRIGHT'), _('SEE ALSO'));
  my %filter = map { $_ => 1 } @pre, @post;
  
  # Output content.
  my %done;
  for my $sect (@pre, (grep !$filter{$_}, @sections), @post)
  {
      next if $done{$sect}++;  # ignore duplicates
      next unless $include{$sect};
      if ($include{$sect})
      {
  	my $quote = $sect =~ /\W/ ? '"' : '';
  	print enc ".SH $quote$sect$quote\n";
  
  	for ($include{$sect})
  	{
  	    # Replace leading dot, apostrophe, backslash and hyphen
  	    # tokens.
  	    s/\x80/\\&./g;
  	    s/\x81/\\&'/g;
  	    s/\x82/\\e/g;
  	    s/\x83/\\-/g;
  
  	    # Convert some latin1 chars to troff equivalents
  	    s/\xa0/\\ /g; # non-breaking space
  
  	    print enc $_;
  	}
      }
  }
  
  close STDOUT or kark N_("%s: error writing to %s (%s)"), $this_program,
      $opt_output || 'stdout', $!;
  
  exit;
  
  # Get program basename, and strip libtool "lt-" prefix if required.
  sub program_basename
  {
      local $_ = shift;
      s!.*/!!;
      s/^lt-// if $opt_libtool;
      $_;
  }
  
  # Call program with given option and return results.
  sub get_option_value
  {
      my ($prog, $opt) = @_;
      my $stderr = $discard_stderr ? '/dev/null' : '&1';
      my $value = join '',
  	map { s/ +$//; expand $_ }
  	map { dec $_ }
  	`$prog $opt 2>$stderr`;
  
      unless ($value)
      {
  	my $err = N_("%s: can't get `%s' info from %s%s");
  	my $extra = $discard_stderr
  	    ? "\n" . N_("Try `--no-discard-stderr' if option outputs to stderr")
  	    : '';
  
  	kark $err, $this_program, $opt, $prog, $extra;
      }
  
      $value;
  }
  
  # Convert option dashes to \- to stop nroff from hyphenating 'em, and
  # embolden.  Option arguments get italicised.
  sub convert_option
  {
      local $_ = '\fB' . shift;
  
      s/-/\x83/g;
      unless (s/\[=(.*)\]$/\\fR[=\\fI$1\\fR]/)
      {
  	s/=(.)/\\fR=\\fI$1/;
  	s/ (.)/ \\fI$1/;
  	$_ .= '\fR';
      }
  
      $_;
  }
  
  # Insert spacing escape characters \, and \/ before and after italic text.  See
  # http://www.gnu.org/software/groff/manual/html_node/Ligatures-and-Kerning.html
  sub fix_italic_spacing
  {
      local $_ = shift;
      s!\\fI(.*?)\\f([BRP])!\\fI\\,$1\\/\\f$2!g;
      return $_;
  }
  

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