update_docs_for_0.27.5.1

[clanmills]

This is it. Should be final change for v0.27.5.1 (v0.27.5 RC1).

[codecov]

Codecov Report

Merging #1865 (4dd6c85) into 0.27-maintenance (8256ad8) will not change coverage.
The diff coverage is n/a.

❗ Current head 4dd6c85 differs from pull request most recent head bfe2b10. Consider uploading reports for the commit bfe2b10 to get more accurate results

@@                Coverage Diff                @@
##           0.27-maintenance    #1865   +/-   ##
=================================================
  Coverage             46.21%   46.21%           
=================================================
  Files                   146      146           
  Lines                 22874    22874           
  Branches              11762    11762           
=================================================
  Hits                  10572    10572           
  Misses                 6696     6696           
  Partials               5606     5606           

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[clanmills]

WTF. Who closed this? Holy Crap. I've just submitted changes to this PR. It's still WIP work in progress.