Various small fixups ran after looking post-release and trying to build Debian package

[yarikoptic]

Dear @datalad/developers and @datalad/contributors , please

• add .md to changelog snippets you might decide to produce/rename manually
• use tests.utils_pytest not tests.utils (old, nose version, we should look to remove it probably after some minor major release)
• (reminder to myself as well) - do not forget to r"" raw strings with escapes (e.g. r"\[")

[codecov]

Codecov Report

Base: 89.32% // Head: 90.95% // Increases project coverage by +1.63% 🎉

Coverage data is based on head (ca608d8) compared to base (969bb82).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##            maint    #7112      +/-   ##
==========================================
+ Coverage   89.32%   90.95%   +1.63%     
==========================================
  Files         355      355              
  Lines       46497    46497              
  Branches     6327     6327              
==========================================
+ Hits        41535    42293     +758     
+ Misses       4947     4189     -758     
  Partials       15       15              

Impacted Files	Coverage Δ
datalad/cli/tests/test_main.py	95.42% <100.00%> (ø)
datalad/metadata/tests/test_metadata.py	100.00% <100.00%> (ø)
datalad/_version.py	45.68% <0.00%> (ø)
datalad/support/annexrepo.py	90.62% <0.00%> (+0.08%)	⬆️
datalad/distribution/tests/test_create_sibling.py	79.83% <0.00%> (+0.21%)	⬆️
datalad/log.py	88.44% <0.00%> (+0.39%)	⬆️
datalad/local/addurls.py	94.95% <0.00%> (+0.45%)	⬆️
datalad/utils.py	88.10% <0.00%> (+0.52%)	⬆️
datalad/core/local/create.py	99.29% <0.00%> (+0.70%)	⬆️
datalad/tests/utils_testrepos.py	94.11% <0.00%> (+0.84%)	⬆️
... and 10 more

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[yarikoptic-gitmate]

PR released in 0.17.9