test-debugextensions: add dummy extension to make ifcontains() test more solid
If testedwith were a string, ifcontains("3.2", testedwith) would match "3.2.1".
New test added to cover that.
#require test-repo pyflakes hg10
$ . "$TESTDIR/helpers-testrepo.sh"
$ cd "`dirname "$TESTDIR"`"
run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)
$ hg locate 'set:**.py or grep("^#!.*python")' \
> -X mercurial/pycompat.py \
> 2>/dev/null \
> | xargs pyflakes 2>/dev/null | "$TESTDIR/filterpyflakes.py"
tests/filterpyflakes.py:61: undefined name 'undefinedname'