bash_completion: ignore hg help error messages
They are usually not useful when you're completing stuff and end up
cluttering the screen.
HGMERGE(1)
==========
Matt Mackall <mpm@selenic.com>
v0.1, 27 May 2005
NAME
----
hgmerge - default wrapper to merge files in Mercurial SCM system
SYNOPSIS
--------
'hgmerge' local ancestor remote
DESCRIPTION
-----------
The hgmerge(1) command provides a graphical interface to merge files in the
Mercurial system. It is a simple wrapper around kdiff3, merge(1) and tkdiff(1),
or simply diff(1) and patch(1) depending on what is present on the system.
hgmerge(1) is used by the Mercurial SCM if the environment variable HGMERGE is
not set.
AUTHOR
------
Written by Vincent Danjean <Vincent.Danjean@free.fr>
SEE ALSO
--------
hg(1) - the command line interface to Mercurial SCM
COPYING
-------
Copyright \(C) 2005 Matt Mackall.
Free use of this software is granted under the terms of the GNU General
Public License (GPL).