[Bug 1100097] [NEW] Documented usage option not implemented

[4dro]

Public bug reported:

Manpages lists :

       --usage
              display brief usage message.

However if existant, it's not compiled within:

:~$ irssi --usage
Unknown option --usage
Run 'irssi --help' to see a full list of available command line options.

I propose to remove --usage from the manpage and change the description
for --help to use the current one from --usage. Least effort and making
the description more meaningful for the --help option:

       -?, --help
              display brief usage message.

** Affects: irssi (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: manpage

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https://bugs.launchpad.net/bugs/1100097

Title:
  Documented usage option not implemented

Status in “irssi” package in Ubuntu:
  New

Bug description:
  Manpages lists :

         --usage
                display brief usage message.

  However if existant, it's not compiled within:

  :~$ irssi --usage
  Unknown option --usage
  Run 'irssi --help' to see a full list of available command line options.

  I propose to remove --usage from the manpage and change the
  description for --help to use the current one from --usage. Least
  effort and making the description more meaningful for the --help
  option:

         -?, --help
                display brief usage message.

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