Add Str.naive-word-wrapper (implementation detail)
Add Str.naive-word-wrapper (implementation detail)

- to be used internally when texts need to be wrapped for a given length
- specifically intended for Exception.message output
- but may have other uses internally

tony-o/rakudo,nbrown/rakudo,nbrown/rakudo,nbrown/rakudo,tony-o/rakudo,MasterDuke17/rakudo,tony-o/rakudo,salortiz/rakudo,tbrowder/rakudo,tony-o/rakudo,salortiz/rakudo,rakudo/rakudo,labster/rakudo,rakudo/rakudo,tbrowder/rakudo,nbrown/rakudo,tbrowder/rakudo,labster/rakudo,rakudo/rakudo,labster/rakudo,MasterDuke17/rakudo,nbrown/rakudo,tbrowder/rakudo,salortiz/rakudo,salortiz/rakudo,tony-o/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,rakudo/rakudo,MasterDuke17/rakudo,nbrown/rakudo,labster/rakudo,rakudo/rakudo,tbrowder/rakudo,rakudo/rakudo,MasterDuke17/rakudo,salortiz/rakudo,labster/rakudo,labster/rakudo,tony-o/rakudo,salortiz/rakudo,MasterDuke17/rakudo