Fix documentation on client address type

docs/requests.md

@@ -60,8 +60,8 @@ For example: `request.path_params['username']`
 
 #### Client Address
 
-The client's remote address is exposed as a named two-tuple `request.client`.
-Either item in the tuple may be `None`.
+The client's remote address is exposed as a named two-tuple `request.client` (or `None`).
+`request.client` may be `None` but each item in the tuple will not be `None`.
 
 The hostname or IP address: `request.client.host`
 

starlette/requests.py

@@ -145,7 +145,7 @@ def cookies(self) -> dict[str, str]:
 
     @property
     def client(self) -> Address | None:
-        # client is a 2 item tuple of (host, port), None or missing
+        # client is a 2 item tuple of (host, port), None if missing
         host_port = self.scope.get("client")
         if host_port is not None:
             return Address(*host_port)