Prepend warnings with "Warning:" outside verbose mode so they're not taken as errors

[Blaisorblade]

Here's this happening:
#2175 (comment)

Since users all over the world confuse warnings with errors, I assume this is more widespread.
OTOH, I'm not sure how to change this non-invasively :-(.

[Blaisorblade]

BTW: @KeeperB5, would this idea have avoided confusing you?

[lehtoj]

Adding Info, Warning and Error prefixes to messages would certainly go a long way informing user what's what. But on the other hand, would it have a side-effect where proper bugs remain ignored because they're merely warnings?

[mgsloan]

Some warnings and errors already do prepending, so it's a little tricky to modify the utilities directly. However, the new pretty print stuff does add some functions like prettyWarning / prettyError / etc. I think it makes sense to add prefixing to these utils and move as much of our warning / error logging to pretty printing as possible.

[mpilgrem]

I am going to close this issue given the passage of time and the developments over time in Stack's reporting. If specific issues remain, they can be identified and dealt with individually.