util._matcher: unify pattern normalization This should fix issue347. It also highlights one issue with the directory walking code when you have an --include pattern that matches the end of a filename. This is fixed by the next patch.

#!/bin/sh

hg init
python -c 'print "confuse str.splitlines\nembedded\rnewline"' > a
hg ci -Ama -d '1 0'
echo clean diff >> a
hg ci -mb -d '2 0'
hg diff -r0 -r1