anchor.diff:      }
     }
   
  +
     visitIf(HIf node) {
       if (tryControlFlowOperation(node)) return;
   
  
positive.code:   }
  
    void addIndentation() {
      if (generatingInlineStatement) {
        generatingInlineStatement = false;
      } else {
        for (int i = 0; i < indent; i++) {
          buffer.add('  ');
        }
      }
    }
  
  
negative.code:         break;
  
        case MULTIPLE_STATEMENTS:
          emitIf();
          visitWithIndent(thenGraph);
  
  