Add doctests for Ior.fromOptions

[markus1189]

Saw them missing ;)

24 Pull Requests (https://24pullrequests.com)

[markus1189]

Do you know about git-extras? And especially the git authors command that comes with it ;) That should make it easier to get a list of contributors.

[codecov-io]

Codecov Report

Merging #2073 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2073   +/-   ##
=======================================
  Coverage   94.66%   94.66%           
=======================================
  Files         318      318           
  Lines        5383     5383           
  Branches      207      207           
=======================================
  Hits         5096     5096           
  Misses        287      287

Impacted Files	Coverage Δ
core/src/main/scala/cats/data/Ior.scala	100% <ø> (ø)	⬆️

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