Support comments in the test ignore file (see ../files/test.exclude) diff -wpruN --no-dereference '--exclude=*.orig' a~/Lib/test/libregrtest/cmdline.py a/Lib/test/libregrtest/cmdline.py --- a~/Lib/test/libregrtest/cmdline.py 1970-01-01 00:00:00 +++ a/Lib/test/libregrtest/cmdline.py 1970-01-01 00:00:00 @@ -196,6 +196,7 @@ class FromFileFilterAction(argparse.Acti items = getattr(namespace, self.dest) with open(value, encoding='utf-8') as fp: for line in fp: + if line.startswith('#'): continue items.append((line.strip(), self.const))