This is a Ruby tree! It shows every object from the Ruby Programming Language in a tree format.

center 

        # String.center

(from ruby core)
---
    str.center(width, padstr=' ')   -> new_str

---

Centers `str` in `width`.  If `width` is greater than the length of
`str`, returns a new String of length `width` with `str` centered and
padded with `padstr`; otherwise, returns `str`.

    "hello".center(4)         #=> "hello"
    "hello".center(20)        #=> "       hello        "
    "hello".center(20, '123') #=> "1231231hello12312312"

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.