Reenable now passing test_path_diff test on Windows

[yarikoptic]

Closes #3725

It is #7191 but against maint since IMHO it is worth there

[codecov]

Codecov Report

Base: 88.28% // Head: 90.92% // Increases project coverage by +2.63% 🎉

Coverage data is based on head (01765fe) compared to base (19404cb).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##            maint    #7194      +/-   ##
==========================================
+ Coverage   88.28%   90.92%   +2.63%     
==========================================
  Files         355      355              
  Lines       46524    46523       -1     
  Branches     6331     6331              
==========================================
+ Hits        41076    42300    +1224     
+ Misses       5433     4208    -1225     
  Partials       15       15              

Impacted Files	Coverage Δ
datalad/core/local/tests/test_diff.py	99.53% <ø> (+2.30%)	⬆️
datalad/support/gitrepo.py	92.74% <0.00%> (+0.15%)	⬆️
datalad/distribution/tests/test_install.py	99.81% <0.00%> (+0.18%)	⬆️
datalad/support/tests/test_annexrepo.py	97.97% <0.00%> (+0.20%)	⬆️
datalad/distribution/create_sibling.py	69.97% <0.00%> (+0.28%)	⬆️
datalad/distribution/tests/test_dataset.py	99.70% <0.00%> (+0.29%)	⬆️
datalad/core/distributed/tests/test_clone.py	97.59% <0.00%> (+0.36%)	⬆️
datalad/support/network.py	90.17% <0.00%> (+0.43%)	⬆️
datalad/core/local/tests/test_save.py	98.05% <0.00%> (+0.48%)	⬆️
datalad/distributed/tests/test_ria_basics.py	98.20% <0.00%> (+0.51%)	⬆️
... and 45 more

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[yarikoptic-gitmate]

PR released in 0.17.10