[MRG+1] Fix numeration

[noviluni]

Fix numeration in selectors documentation.

[codecov]

Codecov Report

Merging #3694 into master will decrease coverage by 0.17%.
The diff coverage is 88.23%.

@@            Coverage Diff             @@
##           master    #3694      +/-   ##
==========================================
- Coverage   84.72%   84.54%   -0.18%     
==========================================
  Files         168      167       -1     
  Lines        9457     9422      -35     
  Branches     1407     1402       -5     
==========================================
- Hits         8012     7966      -46     
- Misses       1188     1199      +11     
  Partials      257      257

Impacted Files	Coverage Δ
scrapy/utils/python.py	82.68% <ø> (ø)	⬆️
scrapy/commands/settings.py	72.72% <ø> (ø)	⬆️
scrapy/selector/lxmlsel.py	88.88% <ø> (ø)	⬆️
scrapy/utils/log.py	88.5% <ø> (ø)	⬆️
scrapy/pipelines/__init__.py	91.66% <ø> (ø)	⬆️
scrapy/spidermiddlewares/referer.py	93.7% <ø> (ø)	⬆️
scrapy/conf.py	85.71% <ø> (ø)	⬆️
scrapy/utils/test.py	54.54% <ø> (ø)	⬆️
scrapy/utils/defer.py	92.98% <ø> (ø)	⬆️
scrapy/core/downloader/handlers/ftp.py	98.24% <ø> (ø)	⬆️
... and 80 more

[Gallaecio]

Please, keep things simple a separate: have a pull request to fix the numbering that only fixes the numbering and a pull request about the duplicate .gitignore entry that only removes the duplicate .gitignore entry.

As for PEP8, see #2144. I do think that, if done, it should include something (e.g. integration of pytest-pylint) that ensures that breaking PEP8 again results in failed tests.

[noviluni]

Hi Adrián!

Totally agree

My first intention was to push only the first commit, but I was working in other pull requests when accidentally pushed to this branch.

I fixed it. I also pushed .gitignore change to another branch and made a PR (#3698). PEP 8 commit was just a proof of concept to discuss about it.

[Gallaecio]

That was quick. Thanks!

[kmike]

Thanks @noviluni!