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/amor.py

@@ -6,7 +6,7 @@
 import collections as co
 import csv
 import itertools as it
-import math as m
+import math as mt
 import os
 
 
@@ -36,7 +36,7 @@ def dat(x):
     try:
         return float(x)
         # just don't allow infinity or nan
-        if m.isinf(x) or m.isnan(x):
+        if mt.isinf(x) or mt.isnan(x):
             raise ValueError("invalid dat %r" % x)
     except ValueError:
         pass