tests: filter out uninteresting log events
Core has new ui.log() calls added (for tracking extension loading and
performance, for example), but in test-discovery-obshashrange.t it produces a
bunch of lines that are unrelated to the test. So we filter them out to not
touch test output. This is inspired by 1de3364320af in core.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
^tests/.*\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes
^docs/training/graphs/
^docs/training/html/
^docs/training/index.html
^docs/training/graphviz-images/
^docs/training/img/
^docs/training/output/
^docs/training/pandocfilters/