I have added a hint to my puzzle, and I wanted to cite the tags used to tag the puzzle.
Of course, the hint had to be spoilerised. However, when I posted, it displayed like this (scroll down to see the hint).
Is there a way to make the tag invisible if the spoiler tag hasn't yet been revealed?
(I can't make an example on meta because the background tag colour is the same as the background spoiler colour, so it doesn't show up)
Note: it seems to have changed now, see here. Out of curiosity, when did this change?