fix lint

Author: jonathanedey

firebase_admin/_messaging_encoder.py

@@ -365,7 +365,7 @@ def encode_android_notification(cls, notification):
                     'AndroidNotification.vibrate_timings_millis', msec)
                 vibrate_timing_strings.append(formated_string)
             result['vibrate_timings'] = vibrate_timing_strings
-        
+
         proxy = result.get('proxy')
         if proxy:
             if proxy not in ('allow', 'deny', 'if_priority_lowered'):

tests/test_messaging.py

@@ -534,7 +534,7 @@ def test_invalid_visibility(self, visibility):
         else:
             expected = 'AndroidNotification.visibility must be a non-empty string.'
         assert str(excinfo.value) == expected
-    
+
     @pytest.mark.parametrize('proxy', NON_STRING_ARGS + ['foo'])
     def test_invalid_proxy(self, proxy):
         notification = messaging.AndroidNotification(proxy=proxy)