Fix warnings_checker.dart handling of multitests

tests/language/sync_generator2_test.dart

Index: tests/language/sync_generator2_test.dart
diff --git a/tests/language/sync_generator2_test.dart b/tests/language/sync_generator2_test.dart
index 82d5863916443eac0ae1e64fe2570dcbdc937023..f4241b3419074352c57443c2ed205d01e2c49c50 100644
--- a/tests/language/sync_generator2_test.dart
+++ b/tests/language/sync_generator2_test.dart
@@ -13,38 +13,38 @@ var await = "topLevelAwait";
 var yield = "topLevelYield";
 
 test01() sync* {
-  var yield = 0; // /// 01: compile-time error
-  var await = 0; // /// 02: compile-time error
-  var async = 0; // /// 03: compile-time error
-  bool yield() => false; /// 04: compile-time error
-  bool await() => false; /// 05: compile-time error
-  bool async() => false; /// 06: compile-time error
+  var yield = 0; // //# 01: compile-time error
+  var await = 0; // //# 02: compile-time error
+  var async = 0; // //# 03: compile-time error
+  bool yield() => false; //# 04: compile-time error
+  bool await() => false; //# 05: compile-time error
+  bool async() => false; //# 06: compile-time error
 
   var x1 = sync;
-  var x2 = async; // /// 07: compile-time error
-  var x3 = await; // /// 08: compile-time error
-  var x4 = await 55; // /// 09: compile-time error
-  var x4 = yield; // /// 10: compile-time error
+  var x2 = async; // //# 07: compile-time error
+  var x3 = await; // //# 08: compile-time error
+  var x4 = await 55; // //# 09: compile-time error
+  var x4 = yield; // //# 10: compile-time error
 
   var stream = new Stream.fromIterable([1, 2, 3]);
-  await for (var e in stream) print(e); //  /// 11: compile-time error
+  await for (var e in stream) print(e); //  //# 11: compile-time error
 }
 
 test02() sync* {
   yield 12321;
-  return null; // /// 20: compile-time error
+  return null; // //# 20: compile-time error
 }
 
-test03() sync* => null; //  /// 30: compile-time error
+test03() sync* => null; //  //# 30: compile-time error
 
-get test04 sync* => null; // /// 40: compile-time error
-set test04(a) sync* { print(a); } // /// 41: compile-time error
+get test04 sync* => null; // //# 40: compile-time error
+set test04(a) sync* { print(a); } // //# 41: compile-time error
 
 class K {
-  K() sync* {}; // /// 50: compile-time error
+  K() sync* {}; // //# 50: compile-time error
   get nix sync* { }
-  get garnix sync* => null; // /// 51: compile-time error
-  set etwas(var z) sync* { } // /// 52: compile-time error
+  get garnix sync* => null; // //# 51: compile-time error
+  set etwas(var z) sync* { } // //# 52: compile-time error
   sync() sync* {
     yield sync;  // Yields a tear-off of the sync() method.
   }
@@ -55,13 +55,13 @@ main() {
   x = test01();
   Expect.equals("()", x.toString());
   x = test02();
-  test03(); /// 30: continued
+  test03(); //# 30: continued
   Expect.equals("(12321)", x.toString());
-  x = test04; // /// 40: continued
-  test04 = x; // /// 41: continued
+  x = test04; // //# 40: continued
+  test04 = x; // //# 41: continued
   x = new K();
-  print(x.garnix); /// 51: continued
-  x.etwas = null; /// 52: continued
+  print(x.garnix); //# 51: continued
+  x.etwas = null; //# 52: continued
   print(x.sync().toList());
   Expect.equals(1, x.sync().length);
 //  Expect.isTrue(x.sync().single is Function);