bpo-30296 Remove unnecessary tuples, lists, sets, and dicts (#1489)

* Replaced list(<generator expression>) with list comprehension
* Replaced dict(<generator expression>) with dict comprehension
* Replaced set(<list literal>) with set literal
* Replaced builtin func(<list comprehension>) with func(<generator
  expression>) when supported (e.g. any(), all(), tuple(), min(), &
  max())

Tools/scripts/byext.py

@@ -83,7 +83,7 @@ class Stats:
             columns.update(self.stats[ext])
         cols = sorted(columns)
         colwidth = {}
-        colwidth["ext"] = max([len(ext) for ext in exts])
+        colwidth["ext"] = max(map(len, exts))
         minwidth = 6
         self.stats["TOTAL"] = {}
         for col in cols: