Not happening for me, I need almost the whole text, although changing some words does seem to preserve the effect. Maybe it's along the lines of notepad's old "Bush hit the facts" bug.

I had a lot of fun changing words in this sentence and maintaining the same yumyum output. I would love a postmortem explaining this.

Wiki has a good explanation of "Bush hid the facts":

https://en.wikipedia.org/wiki/Bush_hid_the_facts