amend: do not traceback on no-ops If rewrite() generated changeset happened to be an existing one, the call would traceback when trying to obsolete the changeset with itself. Instead, leave gracefully, marking any intermediate changeset extinct.

syntax: re
/figures/[^/]+\.png$
^docs/build/
^docs/html/
^html/
\.pyc$
~$
\.orig$
\.rej$
\.err$