Revision history for `optex' command.
v0.99.2 2024-04-28T08:34:50Z
    - Update option value handling.
    - Set exit code in END block so that module's END block works.
v0.99.1 2024-03-22T09:31:18Z
    - Make tabstop configurable in -Mutil::filter module.
v0.99 2024-03-05T01:17:51Z
    - Introduce --filter command in -Mutil::argv module.
    - Version 1.0 release candidate.
v0.6 2023-03-30T11:24:42Z
    - Implement -Mutil::argv::filter() interface.
v0.5.4 2022-07-01T05:37:40Z
    - Use Getopt::EX@v1.28.0 to avoid multiple module call bug.
v0.5.3 2022-06-19T07:06:43Z
    - Decode @ARGV.
v0.5.2 2021-11-01T08:36:05Z
    - Update util::filter::rev_char() to handle logical characters.
    - Make util::filter::visible() to accept empty parameter.
    - Add document for util::argv and util::filter.
    - Add non-blocking space in -Mutil::filter::visible.
v0.5.1 2021-09-12T13:54:25Z
    - Fix for unexpected regex behavior.
v0.5 2021-09-10T15:49:36Z
    - Implement -Mutil::filter::visible() interface.
v0.4.1 2020-11-17T00:14:33Z
    - Add dependency for Time::Piece.
v0.4 2020-10-27T02:15:02Z
    - Show modules in standard search path by -M option.
    - Close STDOUT/STDERR to wait output filter process.
    - Introduce PREFORK function.
v0.3 2019-03-21T07:44:57Z
    - Use given name rather than aliased name for rc and module.
v0.2.3 2018-12-27T08:08:49Z
    - requires 'Getopt::EX', 'v1.13.1';
v0.2.2 2018-09-18T09:12:11Z
    - Support UTF-8 file name and alias.
v0.2.1 2018-08-17T04:38:31Z
    - Declare MSWin32 as unsupported.
v0.2 2018-07-01T02:09:04Z
    - Add --exit option.
v0.1 2018-06-25T14:19:03Z
    - Separate Tmpfile.pm.
v0.0.15 2018-03-24T05:30:20Z
    - Update license.
    - Update '--ls' output to include aliases.
v0.0.14 2018-02-09T02:09:07Z
    - Hmm... `expr -M` does not produce "-M" on freebsd.
v0.0.13 2018-02-08T14:22:53Z
    - Not to use 'echo' command in test.
    - Update '--ls' format.
v0.0.12 2018-01-24T00:19:54Z
    - Make symbolic link to "perl" for "/usr/bin/env perl" to work.
v0.0.11 2018-01-23T11:31:19Z
    - Put error handling in t/02_config.t
    - Change STDERR background to WINE RED.
v0.0.10 2018-01-17T14:23:14Z
    - Implement "no-module" configuration.
v0.0.9 2018-01-15T23:01:47Z
    - Implement command alias with config loader.
    - Supress wide character warning.
    - false(1) says: The false utility always exits with a nonzero exit code.
v0.0.8 2017-12-29T02:15:43Z
    - Fix wrong "mode" declaration.
v0.0.7 2017-12-29T01:52:51Z
    - Implement "chdir" function in util.pm
    - Update to use Getopt::EX new "mode command".
v0.0.6 2017-12-26T01:32:38Z
    - Fix filter.pm to handle STDERR properly.
v0.0.5 2017-12-22T01:24:38Z
    - Use multiple BASECLASS, and use standard module path.
v0.0.4 2017-12-18T09:11:34Z
    - Use Getopt::EX::Colormap new E effect.
v0.0.3 2017-12-16T19:07:20Z
    - Improve module handling.
    - Implement --io-color option in util::filter module.
    - Set PATH before command execution.
    - Require perl 5.014
v0.0.2 2017-11-28T15:12:44Z
    - Clean up test code.
    - Localize $rcloader to work for self option.
    - Document correction about default startup file.
v0.0.1 2017-11-17T04:46:02Z
    - initial release