* [pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 22.12.0 → 23.1.0](https://github.com/psf/black/compare/22.12.0...23.1.0)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci



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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

& update its docstring

* fix includes
* comment out edge cases

unittest/eigen_ref.cpp: asConstRef should take input as Ref<const T>

* Fix flake8 errors

* flake8: ignore E203

* flake8: 119 cols for now

* black

* fix comment style

* exclude cmake.py

* clang-format: sort include

Co-authored-by: Guilhem Saurel <guilhem.saurel@laas.fr>

for more information, see https://pre-commit.ci

* stride reversed also in this case
* add test for (1,n) and (n,1) blocks

* show correct return_value_policy to use

isolates problem with conversion

for more information, see https://pre-commit.ci

* test fails, problem in stride ? only first column modified

run `pre-commit run -a`