make revlog.addgroup pass its file handles to addrevision
This should fix issue255.
It looks like the problem there happens when addgroup calls addrevision
to add a full revision, and addrevision decides to split the index file
into a .i/.d pair. Since addgroup has an open file handle for the
index file, the renaming of the new .i file to its final name fails on
windows.
#!/bin/sh
HG=hg
"$HG" init
mkdir b
echo 'Bouncy' >b/bouncy
echo 'tricycle' >b/vehicle
"$HG" add b/bouncy
"$HG" add b/vehicle
"$HG" commit -m 'Adding bouncy'
echo 'bouncy' >>b/bouncy
"$HG" commit -m 'Making it bouncier'
"$HG" update -C 0
echo 'stationary' >>b/vehicle
"$HG" commit -m 'Clarifying the vehicle.'
"$HG" update -C 1
chmod a-w b/vehicle
"$HG" merge 2 2>&1 | sed 's|^\(.*[ ]\).*/\([^/]*/[^/]*/[^/]*\)$|\1\2|g'