rebase: support --detach when null is common ancestor

templater: fix variable name 'format' was renamed to 'parsed' in 0d50586a9d31

test-hardlinks: add testcase for repo copied with 'cp -al' This patch adds a case to test-hardlinks.t which demonstrates that hardlinks in the working directory are broken up (using 'hg update'). Motivation for this patch: 'hg help clone' shows copying repositories *and* the working directory using 'cp -al', creating hardlinks in the *working directory* too (not just in the store). Note that we can't use 'cp -al' since for example MacOS X doesn't support these options on cp. I'm thus using the same trick as in test-hardlinks-safety.t for creating hardlinks in the working dir.

Merge with stable

subrepo: handle missing subrepo spec file as removed Otherwise, all commands involving a dirstate walk will abort when trying to readone of them. Deleting .hgsub basically breaks a repository.

Merge with stable

subrepo: prune empty directories when removing svn subrepo

subrepo: use subprocess directly to avoid python 2.6 bug Using svn subrepos on MacOSX with native python 2.6.1 results in a lot of unexpected output caused by: http://bugs.python.org/issue5099 subprocess.Popen.__del__ causes AttributeError (os module == None) Avoiding dangling Popen instance solves the issue.

subrepo: fix removing read-only svn files on Windows

check-code: catch 'ls filename --option' case as per 6bdae8ea0b48