Thread:Dinoguy1000/@comment-3388044-20160206035655/@comment-166269-20160208021219

Different people, different coding styles, is probably what that is. Omitting the closing tags for certain HTML elements (such as ) is actually valid HTML (and has been since as far back as HTML 2, IIRC). That doesn't necessarily mean the MediaWiki parser handles them correctly, though, and that may be what caused the messed-up rendering here; if that's the case, the markup probably renders correctly on WP because they have HTML Tidy enabled.