Fix minor spelling issues in oslo.policy

Change-Id: I351ab4f335d3bbb642e9e9bc225dd8725559989b

oslo_policy/_parser.py

@@ -228,7 +228,7 @@ def _parse_list_rule(rule):
     # Outer list is joined by "or"; inner list by "and"
     or_list = []
     for inner_rule in rule:
-        # Elide empty inner lists
+        # Skip empty inner lists
         if not inner_rule:
             continue
 

oslo_policy/policy.py

@@ -409,7 +409,7 @@ class Enforcer(object):
                           {'path': path})
 
     def _get_policy_path(self, path):
-        """Locate the policy json data file/path.
+        """Locate the policy JSON data file/path.
 
         :param path: It's value can be a full path or related path. When
                      full path specified, this function just returns the full