Backed out changeset 2ab464771b7d15c60014996d2853efc92cdb8465 - it always runs chmod - uses chmod in an unsafe way - if somebody does a clone of a repo, runs 'make tests', everything is fine, so he can assume the original repo is fine, too, but it is not.

#!/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