// we can trick Tidy into not stripping them out by including them in tidy's new-empty-tags config
$wrappedtext = preg_replace( '!<(link|meta)([^>]*?)(/{0,1}>)!', '<html-$1$2$3', $wrappedtext );
+ // Preserve empty li elements (T49673) by abusing Tidy's datafld hack
+ // The whitespace class is as in TY_(InitMap)
+ $wrappedtext = preg_replace( "!<li>([ \r\n\t\f]*)</li>!",
+ '<li datafld="" class="mw-empty-li">\1</li>', $wrappedtext );
+
// Wrap the whole thing in a doctype and body for Tidy.
$wrappedtext = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"' .
' "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>' .
// Revert <html-{link,meta}> back to <{link,meta}>
$text = preg_replace( '!<html-(link|meta)([^>]*?)(/{0,1}>)!', '<$1$2$3', $text );
+ // Remove datafld
+ $text = str_replace( '<li datafld=""', '<li', $text );
+
// Restore the contents of placeholder tokens
$text = $this->mTokens->replace( $text );