Revision history for Perl module Term::Highlight and script hl.
2006/01/16 - Version 1.0 - first functional version.
2006/02/10 - Version 1.1 - generic approach to 16/256 color terminals.
2006/02/13 - Version 1.2 - basic functionality moved to Highlight.pm,
supports grep option ('-g') with recursive search ('-r'),
reads from STDIN as well as from file list.
2006/02/15 - Version 1.3 - more sophisticated option reset functionality added.
Support for binary files added.
2008/12/16 - Version 1.4 - support for HL_INITSTRING environment variable
which can be used to set common options
(e.g. default hl color) for all cases.
2008/12/19 - Version 1.5 - distributed as perl package (MakeMaker's Makefile.PL),
Highlight.pm now use strict,
Highlight.pm cleanup from global variable @Patterns
(moved to class implementation),
tagtypes with "xterm" uses "term",
perl pod sections fixed and significantly extended,
'hl -help' cleanup.
2010/08/17 - Version 1.6 - bugfix in hl script.
"Attempt to free unreferenced scalar value" message at exit is
now fixed.
2010/09/17 - Version 1.7 - in hl added possibility to store highlight snippets
in file .hlrc in HOME directory
2011/09/09 - Version 1.7.1 - hl will not put color escape sequences if output
directed not to STDOUT: this will make it possible to use hl
safely in pipes
2015/10/25 - Version 1.8 - fixing multiple errors in hl, including:
option '-' did not work when global option -b was explicitly set,
added global option '-u' to match Unicode characters,
added global option '--' to explicitly separate global and
highlight options.
Highlight.pm version 1.3
resetting of bold typeface and background colors could not work
2016/05/31 - Version 1.8.4 - various fixes related mostly to multiple files
processing