Customizing spoiler text

[randomguy]

I've been playing around with the spoiler tag in the testing area, and I can't figure out how to do what I'm aiming for (or if it's even possible). I know how to put text in a spoiler tag, but I've been trying to figure out how to customize the visible text within that tag. By default, it reads "Reveal hidden contents." Is there a way I can get that text to read something different? Like "Click here if you want to see the answer" or something?