After importing my WordPress posts I’ve discovered a weird behavior that’s not appearing consistently across all those posts: in some, markdown italics are not rendering, because the empty space before the opening asterisk is being read as some other sort of invisible character which effectively “escapes” the asterisk, preventing the italics from rendering. I’ve no idea how this was introduced, no idea what, exactly, the invisible character is, and no way of searching for the posts where this is happening so that I can correct them all.