doctest_docutils.py: Upstream changes

[tony]

Changes

• Typing fixes

• Use import typing as t everywhere

• _from_module: Backport functools.cached_property support:

  • pytest-dev/pytest@e787d2e
  • Fix doctest collection of functools.cached_property objects. pytest-dev/pytest#11317
  • https://github.com/python/cpython/blob/1c26f1ce6c3965b1f7395b60bf45d7fc0bc6de57/Lib/doctest.py#L948-L975
  • https://github.com/python/cpython/blob/0c56c0502270ebe29461fe5cab3ee4d6111da650/Lib/doctest.py#L954-L981

[codecov-commenter]

Codecov Report

Merging #25 (90e83a3) into master (dfbea51) will decrease coverage by 0.56%.
The diff coverage is 17.64%.

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@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
- Coverage   58.92%   58.37%   -0.56%     
==========================================
  Files          10       10              
  Lines         633      639       +6     
==========================================
  Hits          373      373              
- Misses        260      266       +6     

Files	Coverage Δ
src/linkify_issues.py	100.00% <100.00%> (ø)
src/doctest_docutils.py	35.95% <0.00%> (-0.92%)	⬇️
src/pytest_doctest_docutils.py	39.00% <11.11%> (ø)

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