Change development version number structure

[bwohlberg]

For development versions, append short git commit tag to version number to aid in identifying specific version in use.

Also, minor doc string style fixes.

[codecov]

Codecov Report

Merging #271 (7889814) into main (e321920) will decrease coverage by 0.03%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##             main     #271      +/-   ##
==========================================
- Coverage   93.89%   93.85%   -0.04%     
==========================================
  Files          50       51       +1     
  Lines        3683     3696      +13     
==========================================
+ Hits         3458     3469      +11     
- Misses        225      227       +2     

Flag	Coverage Δ
unittests	93.85% <85.71%> (-0.04%)	⬇️

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Impacted Files	Coverage Δ
scico/optimize/admm.py	96.07% <ø> (ø)
scico/_version.py	84.61% <84.61%> (ø)
scico/__init__.py	87.50% <100.00%> (ø)

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