Gus' Quinundrum

Topics:logic fun brain-teaser

Create a function of no arguments which returns a string that is an exact copy of the function itself.

Hint: read this if you get stuck (this question is harder than it first appears); but it's worth the effort to solve it independently if you can!

Fun fact: Gus is the name of the 4Clojure dragon.
test not run
(= (str '__) (__))

Code which fills in the blank: