Document - Tidy up the docstring for the "create_room" module API met…

…hod.

synapse/module_api/__init__.py

@@ -1480,12 +1480,13 @@ async def create_room(
         Returns:
                 A tuple containing the room ID (str) and, if an alias was requested,
                 the room alias (str), otherwise None (if no alias was requested).
+
         Raises:
-            SynapseError if the user_id is invalid, room ID couldn't be stored, or
-            something went horribly wrong.
             ResourceLimitError if server is blocked to some resource being
             exceeded.
             RuntimeError if the user_id does not refer to a local user.
+            SynapseError if the user_id is invalid, room ID couldn't be stored, or
+            something went horribly wrong.
         """
         if not self.is_mine(user_id):
             raise RuntimeError(