Standard spelling on "an HTTP".

Author: aaugustin

docs/project/changelog.rst

@@ -73,7 +73,7 @@ Bug fixes
 
 * The new :mod:`asyncio` and :mod:`threading` implementations of servers don't
   start the connection handler anymore when ``process_request`` or
-  ``process_response`` returns a HTTP response.
+  ``process_response`` returns an HTTP response.
 
 13.0.1
 ------

docs/reference/features.rst

@@ -161,10 +161,9 @@ Client
     | Perform HTTP Digest Authentication | ❌     | ❌     | ❌     | ❌     |
     | (`#784`_)                          |        |        |        |        |
     +------------------------------------+--------+--------+--------+--------+
-    | Connect via a HTTP proxy (`#364`_) | ❌     | ❌     | —      | ❌     |
+    | Connect via HTTP proxy (`#364`_)   | ❌     | ❌     | —      | ❌     |
     +------------------------------------+--------+--------+--------+--------+
-    | Connect via a SOCKS5 proxy         | ❌     | ❌     | —      | ❌     |
-    | (`#475`_)                          |        |        |        |        |
+    | Connect via SOCKS5 proxy (`#475`_) | ❌     | ❌     | —      | ❌     |
     +------------------------------------+--------+--------+--------+--------+
 
 .. _#364: https://github.com/python-websockets/websockets/issues/364
@@ -179,7 +178,7 @@ There is no way to control compression of outgoing frames on a per-frame basis
 
 .. _#538: https://github.com/python-websockets/websockets/issues/538
 
-The server doesn't check the Host header and doesn't respond with a HTTP 400 Bad
+The server doesn't check the Host header and doesn't respond with HTTP 400 Bad
 Request if it is missing or invalid (`#1246`).
 
 .. _#1246: https://github.com/python-websockets/websockets/issues/1246

src/websockets/asyncio/server.py

@@ -203,7 +203,7 @@ async def handshake(
         # self.protocol.handshake_exc is always set when the connection is lost
         # before receiving a request, when the request cannot be parsed, when
         # the handshake encounters an error, or when process_request or
-        # process_response sends a HTTP response that rejects the handshake.
+        # process_response sends an HTTP response that rejects the handshake.
 
         if self.protocol.handshake_exc is not None:
             raise self.protocol.handshake_exc

src/websockets/sync/server.py

@@ -168,7 +168,7 @@ def handshake(
         # self.protocol.handshake_exc is always set when the connection is lost
         # before receiving a request, when the request cannot be parsed, when
         # the handshake encounters an error, or when process_request or
-        # process_response sends a HTTP response that rejects the handshake.
+        # process_response sends an HTTP response that rejects the handshake.
 
         if self.protocol.handshake_exc is not None:
             raise self.protocol.handshake_exc