rem: qx.Proto.getIndentSymbol = function(vUseTreeLines, vIsLastColumn) 
add: qx.Proto.getIndentSymbol = function(vUseTreeLines, vColumn, vLastColumn) 
context: qx.Proto.getIndentSymbol = function(vUseTreeLines, vIsLastColumn){  if (vIsLastColumn &&      (this.hasContent() || this.getAlwaysShowPlusMinusSymbol()))  {    return this.getOpen() ? "minus" : "plus";  }  else  {    return null;  }}
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/979ac1838579962c30222b3f75f3d10fc65a9f22/Tree.js/buggy/qooxdoo/frontend/framework/source/class/qx/ui/treefullcontrol/Tree.js