test: also use 'devel.legacy.exchange=bundle1' in test Changeset 39537bc64442 in mercurial removed the 'experimental.bundle2' option. We use the new option in parallel.

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