evolve: Fix crash when reading docstring Before this patch, hg evolve --divergent could crash when looking for docstring of function of merge.update. We were checking the docstring to work properly with older version of Mercurial. It could crash if an extension would wrap merge.update without keeping the docstring. This patch fixes the crash.

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