Avoids a redraw when the node is inserted because the <div> with
the placeholder table does have height (~ 5px). Causing it to move
everything below it after the page loads.
Bug: T92552
Change-Id: I43d44c070ce6b5861dd3ee0d9968475d24df59a3
if ( !document.getElementById( 'wikiDiff' ) && document.getElementById( 'wikiPreview' ) ) {
$( '#wikiPreview' ).after(
$( '<div>' )
+ .hide()
.attr( 'id', 'wikiDiff' )
.html( '<table class="diff"><col class="diff-marker"/><col class="diff-content"/>' +
'<col class="diff-marker"/><col class="diff-content"/><tbody/></table>' )