Use `Cow` in `{D,Subd}iagnosticMessage`.#111748

Merged

bors merged 1 commit intorust-lang:masterfrom nnethercote:Cow-DiagnosticMessage

May 29, 2023

+308-287

Commits on May 28, 2023

Use Cow in {D,Subd}iagnosticMessage.
nnethercote
committed