# Spoiler mechanism not working

In a recent answer I've tried to hide some text. Unfortunately, something seems broken.

Here's the not-so-hidden text:

! Let $$X$$ be the set of complete theories that satisfy "everything is countable" and have unboundedly many $$\alpha<\omega_1^L$$ with $$L_\alpha$$ realising them. The theory of $$L_{\omega_1^L}$$ is one such theory, and we will be done if we prove that there are some others. Now $$X$$ is a definable class in $$L_{\omega_1^L}$$, and so it must have some other elements or else $$L_{\omega_1^L}$$ would admit a truth defintion ($$\varphi$$ is true in $$L_{\omega_1^L}$$ iff the unique element of $$X$$ contains $$\varphi$$).

I'm not sure what the bug is. The plain-text version of the passage also doesn't hide properly:

! let X be the set of complete theories that satisfy "everything is countable" and have unboundedly many \alpha<\omega_1^L realising them. the theory of L_{\omega_1^L} is one such theory, and we will be done if we prove that there are some others. but X is a definable class in L_{\omega_1^L}, and so it must have some other elements, or L_{\omega_1^L} would admit a truth defintion (\phi iff the unique theory in X satisfies \phi).

But spoilering latex seems to work fine:

This is some latex! $$X$$ $$L_{\omega_1^L}$$

Look at the source code - this part has a newline after each word:

! Spoiler with multiple lines - this does not work.

But this happens if I put the same text into a single line:

Spoiler without multiple lines - this seems to work.

Related posts on Meta Stack Exchange:

• Oh that's annoying. Thanks! Jan 11 at 17:43
• Incidentally, how did you fix it? (I'm curious how to handle "invisible line breaks.") Jan 11 at 17:45
• @NoahSchweber I have edited your answer - for me the spoiler now works as expected. (But it's up to you to say whether this is what you wanted.) I hope that somebody who knows more above this will give you a more detailed response - but I wanted to try at least some quick fix. Jan 11 at 17:45
• Yup, that's great, although I don't actually understand what you changed. Jan 11 at 17:45
• @NoahSchweber If you wish to, we can continue in chat - so that we do not leave many comments here. But I didn't really do anything beyond removing a newline. Jan 11 at 17:48