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/tracebd.py

@@ -13,7 +13,7 @@ import collections as co
 import functools as ft
 import io
 import itertools as it
-import math as m
+import math as mt
 import os
 import re
 import shutil
@@ -257,9 +257,9 @@ def lebesgue_curve(width, height):
     # we create a truncated Z-curve by simply filtering out the points
     # that are outside our region
     curve = []
-    for i in range(2**(2*m.ceil(m.log2(max(width, height))))):
+    for i in range(2**(2*mt.ceil(mt.log2(max(width, height))))):
         # we just operate on binary strings here because it's easier
-        b = '{:0{}b}'.format(i, 2*m.ceil(m.log2(i+1)/2))
+        b = '{:0{}b}'.format(i, 2*mt.ceil(mt.log2(i+1)/2))
         x = int(b[1::2], 2) if b[1::2] else 0
         y = int(b[0::2], 2) if b[0::2] else 0
         if x < width and y < height:
@@ -935,8 +935,8 @@ def main(path='-', *,
 
         # don't forget we've scaled this for braille/dots!
         for row in range(
-                m.ceil(bmap.height/4) if braille
-                else m.ceil(bmap.height/2) if dots
+                mt.ceil(bmap.height/4) if braille
+                else mt.ceil(bmap.height/2) if dots
                 else bmap.height):
             line = bmap.draw(row,
                 read=read,
@@ -966,7 +966,7 @@ def main(path='-', *,
             if wear:
                 mean = (sum(p.wear for p in bmap.pixels)
                     / max(len(bmap.pixels), 1))
-                stddev = m.sqrt(sum((p.wear - mean)**2 for p in bmap.pixels)
+                stddev = mt.sqrt(sum((p.wear - mean)**2 for p in bmap.pixels)
                     / max(len(bmap.pixels), 1))
                 worst = max((p.wear for p in bmap.pixels), default=0)