fixed annotations and test

Author: Alejandro Casanovas

O365/connection.py

@@ -197,7 +197,7 @@ def get_scopes_for(self, user_provided_scopes: Optional[Union[list, str, tuple]]
 
         return list(scopes)
 
-    def prefix_scope(self, scope: Union[tuple, str]) -> str:
+    def prefix_scope(self, scope: str) -> str:
         """ Inserts the protocol scope prefix if required"""
         if self.protocol_scope_prefix:
             if not scope.startswith(self.protocol_scope_prefix):

tests/test_protocol.py

@@ -64,12 +64,8 @@ def test_get_scopes_for(self):
     def test_prefix_scope(self):
         assert(self.proto.prefix_scope('Mail.Read') == 'Mail.Read')
 
-        assert(self.proto.prefix_scope(('Mail.Read',)) == 'Mail.Read')
-        
         self.proto.protocol_scope_prefix = 'test_prefix_'
-        
-        assert(self.proto.prefix_scope(('Mail.Read',)) == 'Mail.Read')
-        
+
         assert(self.proto.prefix_scope('test_prefix_Mail.Read') == 'test_prefix_Mail.Read')
 
         assert(self.proto.prefix_scope('Mail.Read') == 'test_prefix_Mail.Read')