Clean up the clean up of the typed answer.

Clean up the clean up of the typed answer. Like this typing “<” &c. when the card contains “&lt;” (which was originally typed as “<” as well) should work, as well as “\”s.

This is the third try. Improvement over the first: fix conflict in whitespace clean up, over the second: clean up `[` only to avoid `[sound:`s, also make `\`s work, that is, show up.

I don't think these comments about the changes you've made are necessary in the code itself... I think it's better to put the comments about the changes into the commit message, and keep the comments in the code itself limited to explaining how it works now (when it's not self-documenting).