updated comment

Author: daniel-sanche

google/cloud/datastore/helpers.py

@@ -186,7 +186,7 @@ def _set_pb_meaning_from_entity(entity, name, value, value_pb, is_list=False):
         try:
             root_meaning, sub_meaning_list = meaning
         except TypeError:
-            # support parsing pre-v2.20.2 meaning format
+            # if meaning isn't a tuple, fall back to pre-v2.20.2 meaning format
             root_meaning = None
             sub_meaning_list = itertools.repeat(meaning)
         if root_meaning is not None: