Ran black and pylint on files.

release_tests/support/mttserver.py

@@ -25,7 +25,7 @@ class MTTServer:
     async def start(self):
         """Starts the server."""
         self.server = await create_subprocess_exec(*self.cmd)
-        # delays the return untul the serverr is responding.  
+        # delays the return untul the serverr is responding.
         with socket(AF_INET, SOCK_STREAM) as soc:
             while soc.connect_ex((ADDR, self.port)) != 0:
                 continue