Here’s the editor guide section for spoilers. (Note that I tested the instructions for markdown, and that does indeed seem broken in a weird way; the WYSIWYG spoilers still work normally but only support “block” spoilers; you can’t do it for partial bits of lines.)
In this case I think a warning at the top of the comment is sufficient, given the context of the rest of the thread, so up to whether you want to try to reformat your comment around our technical limitations.
Here’s the editor guide section for spoilers. (Note that I tested the instructions for markdown, and that does indeed seem broken in a weird way; the WYSIWYG spoilers still work normally but only support “block” spoilers; you can’t do it for partial bits of lines.)
In this case I think a warning at the top of the comment is sufficient, given the context of the rest of the thread, so up to whether you want to try to reformat your comment around our technical limitations.