old_contents: 
  Ui.Html.extend('Ui.Text', {
  	constructor: function(config) {
  		this.getDrawing().style.whiteSpace = 'pre-line';
  		this.setSelectable(false);
  	}
  });
  
new_contents: 
  Ui.Html.extend('Ui.Text', {
  	constructor: function(config) {
  		this.getDrawing().style.whiteSpace = 'pre-wrap';
  		this.setSelectable(false);
  	}
  });
  
subject: change Ui.Text white space handling to keep each space