Add a comment to `maybeSetLocalizedDiagnosticMessages`
Add a comment to `maybeSetLocalizedDiagnosticMessages`

(Should have included it in the previous PR but missed it...)

kpreisser/TypeScript,Microsoft/TypeScript,weswigham/TypeScript,weswigham/TypeScript,Microsoft/TypeScript,microsoft/TypeScript,microsoft/TypeScript,microsoft/TypeScript,kpreisser/TypeScript,weswigham/TypeScript,kpreisser/TypeScript,Microsoft/TypeScript