6bdcd152c8
1. Command to execute (diff) was getting arguments like b"path". 2. Crash when priting message. 3. In Python 3, b'x'[0] is int, not str, so a test (if) was (silently) always true. This way, upon eit commit (at least) and with Python 3, warning about not merged configuration files was newer printed. (3) prevented prior discovery of (1) and (2). Based on my checks, there are no more problems like (3), but I cannot tell for sure.
