:bug: Remove `ls` from list of system commands to warn about

Fix darker complaint, even though inconsistent

Fix some formatting

Add support for autoformatting using yapf

Merge pull request #13524 from luzpaz/typos Fix various typos

Merge pull request #13523 from Kojoley/ipdoctest-pytest7 ipdoctest compatibility with pytest 7

Fix various typos Found via `codespell -q 3`

unpin pytest

ipdoctest: pytest<7 compatibility

ipdoctest: Merge upstream changes to pytest doctest plugin

Merge pull request #13510 from gousaiyang/fix-3-10-encoding-warning Fix EncodingWarning on Python 3.10

Merge pull request #13518 from Carreau/maint-deprecate-append-to-sys Maint deprecate append to sys

Merge pull request #13513 from slel/patch-1 Sync `latex_symbols.jl` url in two places

MAINT: cleanup imports of tempdir. Many files were importing tempdir from IPython.utils, though all the changes are now upstream in Python. Import directly from tempdir. Use isort/darker on touched files to cleanup imports at the same time

Fixes #13472 by restoring user's terminal cursor

Sync `latex_symbols.jl` url in two places Follow-up to #11399 and #11400. Make sure the comment at the top of https://github.com/ipython/ipython/blob/master/IPython/core/latex_symbols.py points to the file actually used in - https://github.com/ipython/ipython/edit/master/tools/gen_latex_symbols.py

Merge pull request #13506 from Carreau/lazy-magics Allow to configure lazy loadable magics.

MAINT: deprecate append_to_syspath

Allow to configure lazy loadable magics. While we encourage load_ipython_ext to be lazy and not take too much resources, it might not be practical especially when the top level module takes a long time to import. Here we allow to define a mapping between magics names and extension name, and on attempt to execute a non-existing magics we'll look into the lazy mapping and try to load it. We also add a helper to let us interactively register a magic lazily, see the `register_lazy()` method of to magics_manager

Make unicode backslach completion fuzzy and case insensitive Ok, the fuzzy part is super simple. - candidates matching prefix - If no matches: names that contain the string - If no matches :whether each part of the string split on space is contained in the name of the unicode character. That is to say, `\GREEK OMICRON<tab>` will search whether both GREEK and and OMICRON (case insensitive) are available, in the worst case scenario This allows things like `\omicron` to give you proper suggestions. `\nu` will give you latex nu, `\greek nu` with match as the prefix of `GREEK NUMERAL ...` `\Nu` will match all the `... NUMERAL...` in unicode, but `\Nu greek` will limit the searches enough Mitigate #13514