anchor.diff:    }
   """;
   
  -const String TEST_12 = @"""
  +const String TEST_12 = r"""
     class S {
       int fs = 1;
       S() { fs = "2"; }
  
positive.code: 
  // In this test this is only used in a field set (f3 = a) and therefore we infer
  // types for f1, f2 and f3.
  const String TEST_18 = @"""
    class A {
      var f1;
      var f2;
  
negative.code:   }
  """;
  
  const String TEST_10 = r"""
    class A {
      int f;
      A() {
  