Issue4810

[guusbertens]

Small updates to contributions guide:

• Urge contributors to use latest version of the guide
• Fix test coverage reporting command
• Small grammer fix

Related issue: #4810

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 <Name> <Surname>.
  • 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."

[guusbertens]

It would be good to have commit 242dc8d backported, so it ends up in the online documentation.

Apologies, I messed up the commit message of that commit.

[codecov-commenter]

Codecov Report

Merging #4824 into master will decrease coverage by 0.40%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4824      +/-   ##
==========================================
- Coverage   97.60%   97.20%   -0.41%     
==========================================
  Files          43       43              
  Lines        8932     8932              
  Branches     1406     1406              
==========================================
- Hits         8718     8682      -36     
- Misses         95      126      +31     
- Partials      119      124       +5     

Impacted Files	Coverage Δ
aiohttp/web_runner.py	92.47% <0.00%> (-5.31%)	⬇️
aiohttp/pytest_plugin.py	92.54% <0.00%> (-4.97%)	⬇️
aiohttp/tcp_helpers.py	90.00% <0.00%> (-3.34%)	⬇️
aiohttp/connector.py	94.34% <0.00%> (-1.94%)	⬇️
aiohttp/test_utils.py	99.06% <0.00%> (-0.63%)	⬇️
aiohttp/web_protocol.py	92.39% <0.00%> (-0.30%)	⬇️

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[guusbertens]

Wow, I messed up this PR. Multiple issues in one PR, one of which could be backported, and a non-descriptive title. Time to redo it.