anchor.diff:  
     void startElse(HIf node) {
       indent--;
  -    addIndentation();
  -    buffer.add('} else {\n');
  +    addIndented('} else {\n');
       indent++;
       if (node.elseBlock.hasGuards()) {
         startBailoutSwitch();
  
positive.code: 
    void startElse(HIf node) {
      indent--;
      addIndentation();
      buffer.add('} else {\n');
      indent++;
    }
  
  
negative.code: 
    void endIf(HIf node) {
      indent--;
      addIndented('}\n');
    }
  
    void startThen(HIf node) {
      addIndented('if (');
      use(node.inputs[0], JSPrecedence.EXPRESSION_PRECEDENCE);
      buffer.add(') {\n');
      indent++;
  