evolve: handle merge commit with single obsolete parent (issue4389) This handles evolving merge commits with a single obsolete parent. Merge commits with two obsolete parents are still unsupported. Note this depends on a change to merge.graft in core. Older versions of mercurial will not have this functionality. Also, test-unstable.t will fail with older versions.

syntax: re
/figures/[^/]+\.png$
^docs/build/
^docs/html/
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
\.err$
^tests/easy_run.sh$
^build/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$