Fix flake8 errors

Author: studyingegret

fluent.runtime/tests/__init__.py

@@ -1,6 +1,7 @@
 import os
 
+
 # Unify path separator, default path separator on Windows is \ not /
-# Needed because many tests uses dict + string compare to make a virtual file structure
+# Needed in test_falllback.py because it uses dict + string compare to make a virtual file structure
 def normalize_path(path):
-    return "/".join(os.path.split(path))
+    return "/".join(os.path.split(path))

fluent.runtime/tests/test_fallback.py

@@ -27,7 +27,6 @@ def test_bundles(self, codecs_open, isfile):
             "en/one.ftl": "four = exists",
             "en/two.ftl": "five = exists",
         }
-        #isfile.side_effect = lambda p: p in data or ISFILE(p)
         isfile.side_effect = lambda p: normalize_path(p) in data or ISFILE(p)
         codecs_open.side_effect = lambda p, _, __: io.StringIO(data[normalize_path(p)])
         l10n = FluentLocalization(