Specialize the warning for "Hint Rewrite" without an explicit locality.
Specialize the warning for "Hint Rewrite" without an explicit locality.

Fixes #14216.

Zimmi48/coq,ejgallego/coq,JasonGross/coq,coq/coq,JasonGross/coq,SkySkimmer/coq,coq/coq,Zimmi48/coq,coq/coq,coq/coq,Zimmi48/coq,SkySkimmer/coq,ejgallego/coq,JasonGross/coq,ejgallego/coq,ejgallego/coq,SkySkimmer/coq,SkySkimmer/coq,JasonGross/coq,Zimmi48/coq