scripts: Renamed import math alias m -> mt

Mainly to avoid conflicts with match results m, this frees up the single
letter variables m for other purposes.

Choosing a two letter alias was surprisingly difficult, but mt is nice
in that it somewhat matches it (for itertools) and ft (for functools).

scripts/test.py

@@ -14,7 +14,7 @@ import csv
 import errno
 import fnmatch
 import itertools as it
-import math as m
+import math as mt
 import os
 import pty
 import re