# Sometimes rev_len isn't populated
if ( $rev->getSize() !== null ) {
# Size is always public data
# Sometimes rev_len isn't populated
if ( $rev->getSize() !== null ) {
# Size is always public data
$sDiff = ChangesList::showCharacterDifference( $prevSize, $rev->getSize() );
$fSize = Linker::formatRevisionSize( $rev->getSize() );
$s .= ' <span class="mw-changeslist-separator">. .</span> ' . "$fSize $sDiff";
$sDiff = ChangesList::showCharacterDifference( $prevSize, $rev->getSize() );
$fSize = Linker::formatRevisionSize( $rev->getSize() );
$s .= ' <span class="mw-changeslist-separator">. .</span> ' . "$fSize $sDiff";