Merge branch 'main' into revert-14625-ruffisation

Explicit ruff ignoring of existing issues. (#14634)

Explicit ruff ignoring of existing issues.

Revert "Ruffisation"

Python vs IPython: recommend %cd, %env over !cd, !export (#14629) https://ipython.readthedocs.io/en/latest/interactive/python-ipython-diff.html#shell-assignment The quick overview mentioned `!cd DIR` among examples of shell commands one might use — but that doesn't work as user would hope (can only affect commands in same ! e.g. `!cd /; pwd`). That's not as bad now that `!cd` prints a warning, but IMHO better to provide the right mental model up front. => Replaced that with minimal motivation why `!cd` and `!export` can't work, recommending some %magic alternatives; moved it out of examples to not distract, and right before Magics section.

Python vs IPython: recommend %cd, %env over !cd, !export The quick overview mentioned `!cd DIR` among examples of shell commands one might use —but that doesn't work as user would hope (can only affect commands in same ! e.g. `!cd /; pwd`). That's not as bad now that `!cd` prints a warning, but IMHO better to provide the right mental model up front. => Replaced that with minimal motivation why `!cd` and `!export` can't work, recommending some %magic alternatives; moved it out of examples to not distract, and right before Magics section.

deprecare remark and reformat history.py (#14627)

whatsnew 8.31 (#14626)

whatsnew 8.31

deprecare remark and reformat history.py

Ruffisation (#14625)

seom reformat

more fixes

more errors fixing

more fixes

A Large number of code updates. Mostly starting to run ruff on the codebase excluding tests.

misc ruff fixes

misc ruff things

Short in the dark windows issue (#14621)

Always free