tests/test-diff-copy-depth

patch: turned strings with backslashes into raw strings

In Python, the backslash in an unrecognized escape sequence is left
behind, which makes '\.' the same as r'\.'. Relying on this feature is
quite brittle, IMHO.

Removed unnecessary string concatenation as well.

#!/bin/sh

for i in aaa zzz; do
    hg init t
    cd t

    echo "-- With $i"

    touch file
    hg add file
    hg ci -m "Add"

    hg cp file $i
    hg ci -m "a -> $i"

    hg cp $i other-file
    echo "different" >> $i
    hg ci -m "$i -> other-file"

    hg cp other-file somename

    echo "Status":
    hg st -C
    echo
    echo "Diff:"
    hg diff -g
    echo

    cd ..
    rm -rf t
done