From: Joey Hess <joey@kitenet.net>
Date: Tue, 7 Feb 2012 06:59:05 +0000 (-0400)
Subject: fix display of page name in recentchanges after a revert
X-Git-Tag: 3.20120203~171
X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/commitdiff_plain/1b6c1895784db37438ab51a4aebb366aa2e8009d?hp=1b6c1895784db37438ab51a4aebb366aa2e8009d

fix display of page name in recentchanges after a revert

When the wiki is in a subdir of the git repo, a web revert would show
in recentchanges as eg, doc/index, instead of just index.

This happened because decode_git_file caches a $prefix that is dependant
on the $git_dir setting, and the revert code runs with a different
$git_dir, which polluted the $prefix for later.

Fix this by adding a with_git_dir that juggles the variables properly.
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