rebase: make "successors" a set in _computeobsoletenotrebased() There's no apparent reason for this variable to be a list and this avoids converting it to a set when needed.

merge with stable

rebase: do not consider extincts for divergence detection (issue5782) Extinct obsolete changesets cannot cause divergence upon rebase. We compute these obsoletes without a non-obsolete successor (extincts) in _computeobsoletenotrebased() and then filter them out from the set of obsolete revisions to rebase before getting into _checkobsrebase() to check for divergence candidates.

rebase: eliminate node from successors early in _computeobsoletenotrebased()

rebase: add a test case for issue5782 Issue 5782 reports that rebase incorrectly aborts when trying to rebase an extinct revision (an obsolete revision with only obsolete successor). We add a test to demonstrate this: the first "hg rebase" command aborts with the divergence warning while, when allowing divergence, the rebase completes and does not actually produce any divergence.

test: glob the temporary directory out of temporary file path The temporary directory used by python might be outside of '/tmp/' (eg: /dev/shm/) so we glob that part out.