test fix + typo fix

Author: kp-cat

configcatclient/configfetcher.py

@@ -31,10 +31,10 @@ class FetchResponse(object):
     FETCH_TIME = 'fetch_time'
     CONFIG = 'config'
 
-    def __init__(self, response, etag='', fetch_time=get_utc_now_seconds_since_epoch()):
+    def __init__(self, response, etag='', fetch_time=None):
         self._response = response
         self._etag = etag
-        self._fetch_time = fetch_time
+        self._fetch_time = fetch_time if fetch_time is not None else get_utc_now_seconds_since_epoch()
 
     def json(self):
         """Returns the json-encoded content of a response, if any.

configcatclient/interfaces.py

@@ -22,7 +22,7 @@ def set(self, key, value):
 
 class CachePolicy(object):
     """
-    Config cache interface
+    Cache policy interface
     """
     __metaclass__ = ABCMeta
 

configcatclienttests/test_lazyloadingcachepolicy.py

@@ -40,7 +40,7 @@ def test_cache(self):
         self.assertEqual(value, TEST_JSON)
         self.assertEqual(config_fetcher.get_call_count, 1)
 
-        # Get value from Config Store, which doesn't indicates a config_fetcher call (cache)
+        # Get value from Config Store, which doesn't indicate a config_fetcher call (cache)
         value = cache_policy.get()
         self.assertEqual(value, TEST_JSON)
         self.assertEqual(config_fetcher.get_call_count, 1)