It seems to include an additional <pre> <pre> element with a few lines of whitespace, when rendering it in the RSS feed. In fact, it puts the div inside the pre, which is not allowed, and thus some user agents believe there is a pre with a few lines of whitespace, a forgotten close-pre tag, and then it starts the div. In other words, it doesn't look "right" when viewing on some browsers or RSS readers. (In my case, Inoreader.)