Proposal: --warnings-as-errors

[halostatue]

I just had my documentation point out that I had done an imperfect refactoring of t:AppIdentity.Plug.option/0 to t:AppIdentity.Plug.Config.param/0 (and other related changes), but there's no way to see that except to manually run the document generation and watch for this.

If I could call mix docs --warnings-as-errors, then I could add this to my CI steps and ensure that I don’t documentation that won't resolve internally.

[wojtekmach]

Closing in favour of #1564. :)

[halostatue]

I searched issues. I did not search open PRS. Sorry for the noise.