Preserve multibyte UTF-8 characters when obfuscating. This version uses the unicode 'replace' option, so non-UTF-8 encodings will still be mangled. Luckily, there aren't any of those.

#!/bin/sh

hg init a
echo a > a/a
hg --cwd a ci -A -m a
hg clone a b
echo b > b/b
hg --cwd b ci -A -m b
chmod 100 a/.hg
hg --cwd b push ../a
chmod 700 a/.hg