Fix spelling

CHANGES.rst

@@ -56,14 +56,14 @@ Bugfixes
   `#3631 <https://github.com/aio-libs/aiohttp/issues/3631>`_
 - Use correct type for add_view and family
   `#3633 <https://github.com/aio-libs/aiohttp/issues/3633>`_
-- Fix _keepalive field in __slots__ of web_protocol.RequestHandler.
+- Fix _keepalive field in __slots__ of ``RequestHandler``.
   `#3644 <https://github.com/aio-libs/aiohttp/issues/3644>`_
 - Properly handle ConnectionResetError, to silence the "Cannot write to closing
   transport" exception when clients disconnect uncleanly.
   `#3648 <https://github.com/aio-libs/aiohttp/issues/3648>`_
-- Suppress pytest warnings due to test util classes
+- Suppress pytest warnings due to ``test_utils`` classes
   `#3660 <https://github.com/aio-libs/aiohttp/issues/3660>`_
-- Fix overshadowing of overlapped subbaps prefixes.
+- Fix overshadowing of overlapped sub-application prefixes.
   `#3701 <https://github.com/aio-libs/aiohttp/issues/3701>`_
 - Fixed return type annotation for WSMessage.json()
   `#3720 <https://github.com/aio-libs/aiohttp/issues/3720>`_
@@ -81,7 +81,7 @@ Bugfixes
   `#3906 <https://github.com/aio-libs/aiohttp/issues/3906>`_
 - Add URL to the string representation of ClientResponseError.
   `#3959 <https://github.com/aio-libs/aiohttp/issues/3959>`_
-- Accept istr keys in LooseHeaders type hints.
+- Accept ``istr`` keys in ``LooseHeaders`` type hints.
   `#3976 <https://github.com/aio-libs/aiohttp/issues/3976>`_
 - Fixed race conditions in _resolve_host caching and throttling when tracing is enabled.
   `#4013 <https://github.com/aio-libs/aiohttp/issues/4013>`_

docs/spelling_wordlist.txt

@@ -193,6 +193,7 @@ pre
 programmatically
 proxied
 PRs
+proactor
 pubsub
 Punycode
 py
@@ -307,3 +308,4 @@ wss
 www
 xxx
 yarl
+unhandled