py3: fix comparison between int and None If stop is None, the condition was always false on Python 2, as None compares smaller than ints. Therefore we make the condition false if stop is None.

py3: pass regex as bytes

py3: avoid using %r format on bytes Before the patch, the 'b' prefix appeared in the formatted string. Wrapping the bytes as pycompat.bytestr solves this problem. Eventually, I think that we should move away from using %r (like 975e517451a6 and 4d6019c0e0ef did), but that would change output of non-ASCII bytes on Python 2, so we can’t do it on the stable branch. Also, many places continue to use %r, so it would be a good idea to do the change all at once.

py3: use `%d` for int in % formatting On Python 3, `%s` is an alias to `%b`, which requires that the object implements `__bytes__()`, which is not the case for `int`.