Array#repeated_permutation should have arity 1 #1335
Remove arg-less Array#repeated_permutation to match MRI behavior. (Noticed this implementing
$ ruby -e "p .repeated_permutation" -e:1:in `repeated_permutation': wrong number of arguments (0 for 1) (ArgumentError) from -e:1:in `<main>'
$ jruby -e "p .repeated_permutation" #<Enumerator: :repeated_permutation>
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