Add codespell support: pre-commit entry, configuration, some typoes g…

…et fixed (#7775)

## What do these changes do?

See https://github.com/codespell-project/codespell for the codespell
project. I like it and promote everywhere I go ;)

but feel free to disregard this PR, may be take just last commit with 1
obvious typo and may be the "repr" typo fix.

Another commit fixes typos it found and some were I guess whitelisted in
docs/spelling_wordlist.txt where it fixed them too. What is the role/how
that file is used? (I am not familiar, but found similar ones in
jsonschema and few other projects)

## Are there changes in behavior for the user?

somewhat since there is following fix

```
         if t is None:
-            t_repr = "<<Unkown>>"
+            t_repr = "<<Unknown>>"
```

so some reprs would be effected . another change is functional in the
test (taking "an" not "ans" from "answer") but that must not be user
visible

please advise on either you see value for me to bother with CHANGES etc

## Checklist

- [ ] I think the code is well written
- [ ] Unit tests for the changes exist
- [ ] Documentation reflects the changes
- [ ] If you provide code modification, please add yourself to
`CONTRIBUTORS.txt`
  * The format is &lt;Name&gt; &lt;Surname&gt;.
  * Please keep alphabetical order, the file is sorted by names.
- [ ] Add a new news fragment into the `CHANGES` folder
  * name it `<issue_id>.<type>` for example (588.bugfix)
* if you don't have an `issue_id` change it to the pr id after creating
the pr
  * ensure type is one of the following:
    * `.feature`: Signifying a new feature.
    * `.bugfix`: Signifying a bug fix.
    * `.doc`: Signifying a documentation improvement.
    * `.removal`: Signifying a deprecation or removal of public API.
* `.misc`: A ticket has been closed, but it is not of interest to users.
* Make sure to use full sentences with correct case and punctuation, for
example: "Fix issue with non-ascii contents in doctest text files."

---------

Co-authored-by: Sviatoslav Sydorenko <wk.cvs.github@sydorenko.org.ua>

.pre-commit-config.yaml

@@ -92,3 +92,9 @@ repos:
       ^[^/]+[.]rst$
     exclude: >-
       ^CHANGES\.rst$
+- repo: https://github.com/codespell-project/codespell
+  rev: v2.2.6
+  hooks:
+  - id: codespell
+    additional_dependencies:
+    - tomli

aiohttp/client_reqrep.py

@@ -1019,7 +1019,7 @@ async def read(self) -> bytes:
             except BaseException:
                 self.close()
                 raise
-        elif self._released:  # Response explicity released
+        elif self._released:  # Response explicitly released
             raise ClientConnectionError("Connection closed")
 
         await self._wait_released()  # Underlying connection released

aiohttp/helpers.py

@@ -848,7 +848,7 @@ def __repr__(self) -> str:
                 t = get_args(self.__orig_class__)[0]
 
         if t is None:
-            t_repr = "<<Unkown>>"
+            t_repr = "<<Unknown>>"
         elif isinstance(t, type):
             if t.__module__ == "builtins":
                 t_repr = t.__qualname__

aiohttp/http_parser.py

@@ -867,7 +867,7 @@ def feed_data(
 
                 # if stream does not contain trailer, after 0\r\n
                 # we should get another \r\n otherwise
-                # trailers needs to be skiped until \r\n\r\n
+                # trailers needs to be skipped until \r\n\r\n
                 if self._chunk == ChunkState.PARSE_MAYBE_TRAILERS:
                     head = chunk[: len(SEP)]
                     if head == SEP:

docs/abc.rst

@@ -16,7 +16,7 @@ but few of them are.
 aiohttp.web is built on top of few concepts: *application*, *router*,
 *request* and *response*.
 
-*router* is a *plugable* part: a library user may build a *router*
+*router* is a *pluggable* part: a library user may build a *router*
 from scratch, all other parts should work with new router seamlessly.
 
 :class:`aiohttp.abc.AbstractRouter` has the only mandatory method:

docs/client_quickstart.rst

@@ -75,7 +75,7 @@ endpoints of ``http://httpbin.org`` can be used the following code::
    every request is a **very bad** idea.
 
    A session contains a connection pool inside. Connection reusage and
-   keep-alives (both are on by default) may speed up total performance.
+   keep-alive (both are on by default) may speed up total performance.
 
    You may find more information about creating persistent sessions
    in :ref:`aiohttp-persistent-session`.

docs/client_reference.rst

@@ -1316,7 +1316,7 @@ Response object
       Reading from the stream may raise
       :exc:`aiohttp.ClientPayloadError` if the response object is
       closed before response receives all data or in case if any
-      transfer encoding related errors like misformed chunked
+      transfer encoding related errors like malformed chunked
       encoding of broken compression data.
 
    .. attribute:: cookies

docs/index.rst

@@ -22,7 +22,7 @@ Key Features
   :ref:`Client WebSockets <aiohttp-client-websockets>` out-of-the-box
   without the Callback Hell.
 - Web-server has :ref:`aiohttp-web-middlewares`,
-  :ref:`aiohttp-web-signals` and plugable routing.
+  :ref:`aiohttp-web-signals` and pluggable routing.
 
 .. _aiohttp-installation:
 

docs/spelling_wordlist.txt

@@ -182,7 +182,6 @@ middleware
 middlewares
 miltidict
 misbehaviors
-misformed
 Mixcloud
 Mongo
 msg
@@ -223,7 +222,7 @@ performant
 pickleable
 ping
 pipelining
-plugable
+pluggable
 plugin
 poller
 pong
@@ -285,7 +284,6 @@ shourtcuts
 skipuntil
 Skyscanner
 SocketSocketTransport
-softwares
 ssl
 SSLContext
 startup

pyproject.toml

@@ -17,3 +17,7 @@ issue_format = "`#{issue} <https://github.com/aio-libs/aiohttp/issues/{issue}>`_
 test-command = ""
 # don't build PyPy wheels, install from source instead
 skip = "pp*"
+
+[tool.codespell]
+skip = '.git,*.pdf,*.svg,Makefile,CONTRIBUTORS.txt,venvs,_build'
+ignore-words-list = 'te'

tests/test_client_functional.py

@@ -2014,7 +2014,7 @@ async def handler(request):
 
 async def test_payload_content_length_by_chunks(aiohttp_client: Any) -> None:
     async def handler(request):
-        resp = web.StreamResponse(headers={"content-length": "3"})
+        resp = web.StreamResponse(headers={"content-length": "2"})
         await resp.prepare(request)
         await resp.write(b"answer")
         await resp.write(b"two")
@@ -2027,7 +2027,7 @@ async def handler(request):
 
     resp = await client.get("/")
     data = await resp.read()
-    assert data == b"ans"
+    assert data == b"an"
     resp.close()