Make Str.trim between 1.5x and 3x faster
Make Str.trim between 1.5x and 3x faster

- 3x faster if no whitespace around it
- 1.5x faster if there *was* whitespace to be removed

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