Fix two typos.

Found by codereview.doctor (among many false positives).

Author: aaugustin

example/deployment/kubernetes/benchmark.py

@@ -11,7 +11,7 @@
 async def run(client_id, messages):
     async with websockets.connect(URI) as websocket:
         for message_id in range(messages):
-            await websocket.send("{client_id}:{message_id}")
+            await websocket.send(f"{client_id}:{message_id}")
             await websocket.recv()
 
 

tests/test_headers.py

@@ -140,7 +140,7 @@ def test_parse_subprotocol_invalid_header(self):
         for header in [
             # Truncated examples
             "",
-            ",\t,"
+            ",\t,",
             # Wrong delimiter
             "foo; bar",
         ]: