2611 - MonadError syntax for OptionT uses incorrect instance

[barambani]

Fixes #2611

[kailuowang]

This is awesome! Thanks so much!

[codecov-io]

Codecov Report

Merging #2615 into master will decrease coverage by 0.02%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #2615      +/-   ##
==========================================
- Coverage   95.14%   95.11%   -0.03%     
==========================================
  Files         363      363              
  Lines        6695     6697       +2     
  Branches      291      307      +16     
==========================================
  Hits         6370     6370              
- Misses        325      327       +2

Impacted Files	Coverage Δ
...patTest/src/main/scala/catsBC/MimaExceptions.scala	0% <0%> (ø)	⬆️
core/src/main/scala/cats/data/OptionT.scala	96.29% <100%> (ø)	⬆️

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[kailuowang]

My merge using GitHub might broke the format, would you mind run sbt fmt?

[kailuowang]

Thanks!