"If you're seriously asking how to use the embedded function, just type the word "spoiler" in brackets, followed by your content, and then "/spoiler" in brackets at the end."
The rules page said "control-S" which of course is already used by the "Save" function. I'll give it a try.

Anarchy and Chaos are the natural state of the human race. Civilization is unnatural. It is a whim of circumstance. And Chaos must always ultimately triumph.