Elaborate on Foldable#collectFirst comment

[kubukoz]

btw. would it make sense to say more about the trick used?

[johnynek]

it would make sense to add to the comment, which is a general trick to avoid calling both isDefined and apply, but also to avoid using lift.

[kubukoz]

I'll add a mention of that.

[codecov-io]

Codecov Report

Merging #2278 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2278   +/-   ##
=======================================
  Coverage   94.97%   94.97%           
=======================================
  Files         337      337           
  Lines        5832     5832           
  Branches      217      217           
=======================================
  Hits         5539     5539           
  Misses        293      293

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

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[kubukoz]

Finally found a moment to add more info, please review

[ceedubs]

Thanks @kubukoz! This trick is new to me, so I definitely appreciate the explanation :)

[johnynek]

👍

[kubukoz]