Replace List with Chain in Validated's docs

[kun-song]

• ValidatedNel to ValidatedNec
• NonEmptyList to NonEmptyChain
• List to Chain

[LukaJCB]

This is great, thanks!
It still seems to run into some errors with tut though, it'd be great if you could fix those :)

[kun-song]

Hi @LukaJCB , the reason for the tut errors is the missing toValidatedNec method of Validated, there's a toValidatedNel in it.

So should I add toValidatedNec to Validated, or what else I can do to avoid the errors?

Thanks :)

[LukaJCB]

Can you merge this with master now that #2487 is merged? :)

[codecov-io]

Codecov Report

Merging #2472 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2472   +/-   ##
=======================================
  Coverage   95.33%   95.33%           
=======================================
  Files         358      358           
  Lines        6533     6533           
  Branches      273      273           
=======================================
  Hits         6228     6228           
  Misses        305      305

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[kailuowang]

Thank you!