added failing test to demo function diffing
added failing test to demo function diffing

ashaffer/deku,joshrtay/deku,dekujs/deku,stonegithubs/deku,IveWong/deku,ggd543/deku,balaprasanna/deku,balaprasanna/deku,oeb25/deku,evilemon/deku,sunriseshow/deku,ulrikaugustsson/deku,kvnneff/deku,joshrtay/deku