re.sub regex won't match

[pythoncoder]

So (correct me if I'm wrong) the take-home from this is that ure has a limitation by design.

In CPython and MicroPython the string r'\n' contains two characters, '\' and 'n'. CPython's re module interprets these as a '\n' character while ure treats them literally.

I guess in most cases the workround is to avoid (or at least think hard about) r strings in ure regexes.