code: function _ApplyDiffFromStart($Diff) {
  		$this->pST_PosEnd += $Diff;
  		$this->pST_Src = false;
  		if ($this->pET_PosBeg!==false) $this->pET_PosBeg += $Diff;
  		$this->PosEnd += $Diff;
  	}
docs: Update positions when attributes of the start tag has been upated.