Spoilers outside of Spoiler Tags

Maybe I interpreted what Mikaya said as something different. But I thought that she was instead asking to somehow highlight the text so that we can't see it, rather than having a whole black box that stretches across the page.

The only difference between those two(other that the stretching across the page thing) is that Kapra's warns you that it's a spoiler once you hover over it, while a normal highlight(I think) wouldn't warn you.

I believe she meant something more like this, rather than have it span like this.

Edit: Oh. I see what you mean now.