Fix warnings_checker.dart handling of multitests

tests/language/if_null_assignment_static_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Verify that the static type of a ??= b is the least upper bound of the
 // static types of a and b.
 
 import "package:expect/expect.dart";
 
 // Determine whether the VM is running in checked mode.
@@ skipping 58 matching lines @@
 
   void set a(dynamic value) { bad(); }
 
   dynamic get b => bad();
 
   void set b(dynamic value) { bad(); }
 
   void derivedTest() {
     // The static type of super.v ??= e is the LUB of the static types of
     // super.v and e.
-    (super.a ??= new A()).a; /// 01: ok
-    Expect.throws(() => (super.a ??= new A()).b, noMethod); /// 02: static type warning
-    (super.a ??= new B()).a; /// 03: ok
-    (super.a ??= new B()).b; /// 04: static type warning
+    (super.a ??= new A()).a; //# 01: ok
+    Expect.throws(() => (super.a ??= new A()).b, noMethod); //# 02: static type warning
+    (super.a ??= new B()).a; //# 03: ok
+    (super.a ??= new B()).b; //# 04: static type warning
     if (!checkedMode) {
-      (super.b ??= new A()).a; /// 05: ok
-      Expect.throws(() => (super.b ??= new A()).b, noMethod); /// 06: static type warning
+      (super.b ??= new A()).a; //# 05: ok
+      Expect.throws(() => (super.b ??= new A()).b, noMethod); //# 06: static type warning
 
       // Exactly the same static warnings that would be caused by super.v = e
       // are also generated in the case of super.v ??= e.
-      super.b ??= new C(); /// 07: static type warning
+      super.b ??= new C(); //# 07: static type warning
     }
   }
 }
 
 main() {
   // Make sure the "none" test fails if "??=" is not implemented.  This makes
   // status files easier to maintain.
   var _; _ ??= null;
 
   new DerivedClass().derivedTest();
 
   // The static type of v ??= e is the LUB of the static types of v and e.
-  (a ??= new A()).a; /// 08: ok
-  Expect.throws(() => (a ??= new A()).b, noMethod); /// 09: static type warning
-  (a ??= new B()).a; /// 10: ok
-  (a ??= new B()).b; /// 11: static type warning
+  (a ??= new A()).a; //# 08: ok
+  Expect.throws(() => (a ??= new A()).b, noMethod); //# 09: static type warning
+  (a ??= new B()).a; //# 10: ok
+  (a ??= new B()).b; //# 11: static type warning
   if (!checkedMode) {
-    (b ??= new A()).a; /// 12: ok
-    Expect.throws(() => (b ??= new A()).b, noMethod); /// 13: static type warning
+    (b ??= new A()).a; //# 12: ok
+    Expect.throws(() => (b ??= new A()).b, noMethod); //# 13: static type warning
 
     // Exactly the same static warnings that would be caused by v = e are also
     // generated in the case of v ??= e.
-    b ??= new C(); /// 14: static type warning
+    b ??= new C(); //# 14: static type warning
   }
 
   // The static type of C.v ??= e is the LUB of the static types of C.v and e.
-  (ClassWithStaticGetters.a ??= new A()).a; /// 15: ok
-  Expect.throws(() => (ClassWithStaticGetters.a ??= new A()).b, noMethod); /// 16: static type warning
-  (ClassWithStaticGetters.a ??= new B()).a; /// 17: ok
-  (ClassWithStaticGetters.a ??= new B()).b; /// 18: static type warning
+  (ClassWithStaticGetters.a ??= new A()).a; //# 15: ok
+  Expect.throws(() => (ClassWithStaticGetters.a ??= new A()).b, noMethod); //# 16: static type warning
+  (ClassWithStaticGetters.a ??= new B()).a; //# 17: ok
+  (ClassWithStaticGetters.a ??= new B()).b; //# 18: static type warning
   if (!checkedMode) {
-    (ClassWithStaticGetters.b ??= new A()).a; /// 19: ok
-    Expect.throws(() => (ClassWithStaticGetters.b ??= new A()).b, noMethod); /// 20: static type warning
+    (ClassWithStaticGetters.b ??= new A()).a; //# 19: ok
+    Expect.throws(() => (ClassWithStaticGetters.b ??= new A()).b, noMethod); //# 20: static type warning
 
     // Exactly the same static warnings that would be caused by C.v = e are
     // also generated in the case of C.v ??= e.
-    ClassWithStaticGetters.b ??= new C(); /// 21: static type warning
+    ClassWithStaticGetters.b ??= new C(); //# 21: static type warning
   }
 
   // The static type of e1.v ??= e2 is the LUB of the static types of e1.v and
   // e2.
-  (new ClassWithInstanceGetters().a ??= new A()).a; /// 22: ok
-  Expect.throws(() => (new ClassWithInstanceGetters().a ??= new A()).b, noMethod); /// 23: static type warning
-  (new ClassWithInstanceGetters().a ??= new B()).a; /// 24: ok
-  (new ClassWithInstanceGetters().a ??= new B()).b; /// 25: static type warning
+  (new ClassWithInstanceGetters().a ??= new A()).a; //# 22: ok
+  Expect.throws(() => (new ClassWithInstanceGetters().a ??= new A()).b, noMethod); //# 23: static type warning
+  (new ClassWithInstanceGetters().a ??= new B()).a; //# 24: ok
+  (new ClassWithInstanceGetters().a ??= new B()).b; //# 25: static type warning
   if (!checkedMode) {
-    (new ClassWithInstanceGetters().b ??= new A()).a; /// 26: ok
-    Expect.throws(() => (new ClassWithInstanceGetters().b ??= new A()).b, noMethod); /// 27: static type warning
+    (new ClassWithInstanceGetters().b ??= new A()).a; //# 26: ok
+    Expect.throws(() => (new ClassWithInstanceGetters().b ??= new A()).b, noMethod); //# 27: static type warning
 
     // Exactly the same static warnings that would be caused by e1.v = e2 are
     // also generated in the case of e1.v ??= e2.
-    new ClassWithInstanceGetters().b ??= new C(); /// 28: static type warning
+    new ClassWithInstanceGetters().b ??= new C(); //# 28: static type warning
   }
 
   // The static type of e1[e2] ??= e3 is the LUB of the static types of e1[e2]
   // and e3.
-  ((<A>[null])[0] ??= new A()).a; /// 29: ok
-  Expect.throws(() => ((<A>[null])[0] ??= new A()).b, noMethod); /// 30: static type warning
-  ((<A>[null])[0] ??= new B()).a; /// 31: ok
-  ((<A>[null])[0] ??= new B()).b; /// 32: static type warning
+  ((<A>[null])[0] ??= new A()).a; //# 29: ok
+  Expect.throws(() => ((<A>[null])[0] ??= new A()).b, noMethod); //# 30: static type warning
+  ((<A>[null])[0] ??= new B()).a; //# 31: ok
+  ((<A>[null])[0] ??= new B()).b; //# 32: static type warning
   if (!checkedMode) {
-    ((<B>[null])[0] ??= new A()).a; /// 33: ok
-    Expect.throws(() => ((<B>[null])[0] ??= new A()).b, noMethod); /// 34: static type warning
+    ((<B>[null])[0] ??= new A()).a; //# 33: ok
+    Expect.throws(() => ((<B>[null])[0] ??= new A()).b, noMethod); //# 34: static type warning
 
     // Exactly the same static warnings that would be caused by e1[e2] = e3 are
     // also generated in the case of e1[e2] ??= e3.
-    (<B>[null])[0] ??= new C(); /// 35: static type warning
+    (<B>[null])[0] ??= new C(); //# 35: static type warning
   }
 
   // The static type of e1?.v op= e2 is the static type of e1.v op e2,
   // therefore the static type of e1?.v ??= e2 is the static type of
   // e1.v ?? e2, which is the LUB of the static types of e1?.v and e2.
-  (new ClassWithInstanceGetters()?.a ??= new A()).a; /// 36: ok
-  Expect.throws(() => (new ClassWithInstanceGetters()?.a ??= new A()).b, noMethod); /// 37: static type warning
-  (new ClassWithInstanceGetters()?.a ??= new B()).a; /// 38: ok
-  (new ClassWithInstanceGetters()?.a ??= new B()).b; /// 39: static type warning
+  (new ClassWithInstanceGetters()?.a ??= new A()).a; //# 36: ok
+  Expect.throws(() => (new ClassWithInstanceGetters()?.a ??= new A()).b, noMethod); //# 37: static type warning
+  (new ClassWithInstanceGetters()?.a ??= new B()).a; //# 38: ok
+  (new ClassWithInstanceGetters()?.a ??= new B()).b; //# 39: static type warning
   if (!checkedMode) {
-    (new ClassWithInstanceGetters()?.b ??= new A()).a; /// 40: ok
-    Expect.throws(() => (new ClassWithInstanceGetters()?.b ??= new A()).b, noMethod); /// 41: static type warning
+    (new ClassWithInstanceGetters()?.b ??= new A()).a; //# 40: ok
+    Expect.throws(() => (new ClassWithInstanceGetters()?.b ??= new A()).b, noMethod); //# 41: static type warning
 
     // Exactly the same static warnings that would be caused by e1.v ??= e2 are
     // also generated in the case of e1?.v ??= e2.
-    new ClassWithInstanceGetters()?.b ??= new C(); /// 42: static type warning
+    new ClassWithInstanceGetters()?.b ??= new C(); //# 42: static type warning
   }
 }