Implement require_hash in the get method of Jupytext's content manager

[mwouts]

Will close #1165

TODO:

• Find out how to properly combine two hashes
• Don't add a require_hash argument if the original contents manager does not have one
• Add a test against jupyter_server==2.10.x

[github-actions]

Thank you for making this pull request.

Did you know? You can try it on Binder: or .

Also, the version of Jupytext developed in this PR can be installed with pip:

HATCH_BUILD_HOOKS_ENABLE=true pip install git+https://github.com/mwouts/jupytext.git@implement_require_hash

(this requires nodejs, see more at Developing Jupytext)

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.43%. Comparing base (af4a8eb) to head (e019b91).

Files with missing lines	Patch %	Lines
src/jupytext/contentsmanager.py	94.44%	1 Missing ⚠️

Additional details and impacted files

@@                                  Coverage Diff                                   @@
##           fix_notebook_corruption_with_jupyter_collaboration    #1202      +/-   ##
======================================================================================
- Coverage                                               97.03%   95.43%   -1.60%     
======================================================================================
  Files                                                      29       29              
  Lines                                                    4479     4493      +14     
======================================================================================
- Hits                                                     4346     4288      -58     
- Misses                                                    133      205      +72     

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