Use Levenshtein to suggest variables/routines/superclasses

    my $foo = 10; say $Foo; - "did you mean $foo?"
    my @bar = 1,2,3; say $bar[1]; - "did you mean @bar?"
    spit("Foo Bar Baz"); - "spit used at line 1. Did you mean '&split'?"
    class ExactlyTwo is Junktion { }; - "'ExactlyTwo' cannot inherit from 'Junktion' because it is unknown. Did you mean 'Junction'?"