win32mbcs: util.normpath should be wrapped.
It is because util.normpath() finally calls windows.pconvert()
which is not wrapped (by changeset:
25c41ddb3978).
#!/bin/sh
hg init a
cd a
mkdir a
echo a > a/b
hg ci -Am m
hg rm a
hg ci -m m a
mkdir a b
echo a > a/b
hg ci -Am m
hg rm a
cd b
# relative delete
hg ci -m m ../a