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undump 

        # String.undump

(from ruby core)
---
    undump -> string

---

Returns an unescaped version of `self`:

    s_orig = "\f\x00\xff\\\""    # => "\f\u0000\xFF\\\""
    s_dumped = s_orig.dump       # => "\"\\f\\x00\\xFF\\\\\\\"\""
    s_undumped = s_dumped.undump # => "\f\u0000\xFF\\\""
    s_undumped == s_orig         # => true

Related: String#dump (inverse of String#undump).

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