nl_tokens: Remove the first empty inline element of the block so this : <p > <b > <em > < / em > < / b > x< / p > becomes this : <p > x< / p >
pl_tokens: function trimInlineElementsOnLeftSideOfBlock ( block ) { var node = block , firstChilds = [ ] , i ; // Find inner most first child ex: <p><i><b>*</b></i></p>
   while ( node = node . firstChild ) { if ( dom . isBlock ( node ) ) { return ; } if ( node . nodeType == 1 && ! nonEmptyElementsMap [ node . nodeName . toLowerCase ( ) ] ) { firstChilds . push ( node ) ; } } i = firstChilds . length ; while ( i -- ) { node = firstChilds [ i ] ; if ( ! node . hasChildNodes ( ) || ( node . firstChild == node . lastChild && node . firstChild . nodeValue === '' ) ) { dom . <mask> ( node ) ; } else { // Remove <a> </a> see #5381
   if ( node . nodeName == "A" && ( node . innerText || node . textContent ) === ' ' ) { dom . remove ( node ) ; } } } }