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rjust 

        # String.rjust

(from ruby core)
---
    str.rjust(integer, padstr=' ')   -> new_str

---

If *integer* is greater than the length of *str*, returns a new String
of length *integer* with *str* right justified and padded with *padstr*;
otherwise, returns *str*.

    "hello".rjust(4)            #=> "hello"
    "hello".rjust(20)           #=> "               hello"
    "hello".rjust(20, '1234')   #=> "123412341234123hello"

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