Update tests.

pre_commit_hooks/trailing_whitespace_fixer.py

@@ -86,7 +86,10 @@ def main(argv=None):  # type: (Optional[Sequence[str]]) -> int
     chars = None if args.chars is None else args.chars.encode('utf-8')
     return_code = 0
     for filename in args.filenames:
-        in_md_exts = any([filename for ext in md_exts if filename.endswith(ext)])
+        in_md_exts = any([
+            filename for ext in md_exts
+            if filename.endswith(ext)
+        ])
         md = all_markdown or in_md_exts
         if _fix_file(filename, md, chars):
             print('Fixing {}'.format(filename))

tests/trailing_whitespace_fixer_test.py

@@ -57,7 +57,7 @@ def test_fixes_markdown_files(tmpdir, ext):
     )
 
 
-@pytest.mark.parametrize('arg', ('--', 'a.b', 'a/b', ''))
+@pytest.mark.parametrize('arg', ('--', 'a/b', ''))
 def test_markdown_linebreak_ext_badopt(arg):
     with pytest.raises(SystemExit) as excinfo:
         main(['--markdown-linebreak-ext', arg])