marked by <-- HERE in m/%s/
-(W unsafe) The character class constructs [: :], [= =], and [. .] go
+(W regexp) The character class constructs [: :], [= =], and [. .] go
I<inside> character classes, the [] are part of the construct, for example:
/[012[:alpha:]345]/. Note that [= =] and [. .] are not currently
implemented; they are simply placeholders for future extensions and will
=item Prototype mismatch: %s vs %s
-(S unsafe) The subroutine being declared or defined had previously been
+(S prototype) The subroutine being declared or defined had previously been
declared or defined with a different function prototype.
=item Quantifier in {,} bigger than %d in regex;