ruff: first line split + imperative mood

[SkafteNicki]

What does this PR do?

Fixes part of #1484
Fixes the following in src

• Missing docstring in public function
• 1 blank line required between summary line and description
• First line of docstring should be in imperative mood: ...

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

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[codecov]

Codecov Report

Merging #1548 (34579e1) into master (82d5271) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1548   +/-   ##
======================================
  Coverage      88%     88%           
======================================
  Files         216     216           
  Lines       11344   11344           
======================================
  Hits         9969    9969           
  Misses       1375    1375