'bzr merge --preview' does not allow '--using' option

[James Hunt]

'bzr merge --preview' shows a diff of the merge, but does not actually perform the merge.

However, that command does not provide a '--using' option limiting you to a plain text dump. This is fine for small diffs, but for anything sizeable, it would be extremely helpful (and consistent with 'bzr diff') if 'bzr merge --preview' could be made to support the '--using' option to preview the merge.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: bzr 2.5.0-1ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic-pae 3.2.6
Uname: Linux 3.2.0-16-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.93-0ubuntu2
Architecture: i386
Date: Thu Mar 1 11:09:57 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: bzr
UpgradeStatus: Upgraded to precise on 2012-01-12 (48 days ago)

[James Hunt (jamesodhunt)]

This limitation can be worked around like this:

$ bzr merge <foo>
$ bzr diff --using=<bar>
$ bzr revert