Handle recursion in Array#to_s.
Add Float#inspect as an alias for Float#to_s and untag some more specs.
Handle recursion in Array#eql? and Array#==.
Tag the specs again. They pass locally, but not on Travis.
Merge pull request #455 from jerith/jerith/array-recursion-equality

Handle recursion in Array#eql? and Array#==.
Merge pull request #454 from jerith/jerith/array-recursion-to_s

Handle recursion in Array#to_s.
Fixed #426 -- return an instance of an Array subclass correctly.
simplify this
this is already implemented elsewhere