fix warnings

Author: pragatimodi

firebase_admin/multi_factor_config_mgt.py

@@ -84,7 +84,7 @@ class TOTPProviderServerConfig:
             def __init__(self, data):
                 if not isinstance(data, dict):
                     raise ValueError(
-                        'Invalid data argument in TOTPProviderServerConfig' 
+                        'Invalid data argument in TOTPProviderServerConfig'
                         'constructor: {0}'.format(data))
                 self._data = data