Clarify warning for how to resolve ambiguous types

This warning message had me confused in two ways:
1) It wasn't clear that a remedy was suggested.
2) It wasn't clear before which definition the remedy was for.

Hopefully this clears this up for new users.
Clarify warning for how to resolve ambiguous types (take 2)

This warning message had me confused in two ways:
1) It wasn't clear that a remedy was suggested.
2) It wasn't clear before which definition the remedy was for.
3) (new) Doesn't use odd capitalization (as in previous patch).

Hopefully this clears this up for new users.
Merge pull request #4704 from GlenHertz/patch-6

Clarify warning for how to resolve ambiguous types