Fix warnings_checker.dart handling of multitests

tests/language_strong/bit_operations_test.dart

Index: tests/language_strong/bit_operations_test.dart
diff --git a/tests/language_strong/bit_operations_test.dart b/tests/language_strong/bit_operations_test.dart
index 882b8f1981f5ed0a7d5fffb7857be0ea9f4c4260..a704f682970e529532fa684ee843a024d8d7f981 100644
--- a/tests/language_strong/bit_operations_test.dart
+++ b/tests/language_strong/bit_operations_test.dart
@@ -93,19 +93,19 @@ void testLeftShift64Bit() {
   Expect.equals(0xffffffff, t << 0);
   Expect.equals(0x1fffffffe, t << 1);
   Expect.equals(0x7fffffff80000000, t << 31);
-  Expect.equals(0x10000000000000000, 2*(t+1) << 31); /// 01: static type warning
-  Expect.equals(0x20000000000000000, 4*(t+1) << 31); /// 02: static type warning
+  Expect.equals(0x10000000000000000, 2*(t+1) << 31); //# 01: static type warning
+  Expect.equals(0x20000000000000000, 4*(t+1) << 31); //# 02: static type warning
   Expect.equals(0x8000000000000000, (t+1) << 31);
 }
 
 void testLeftShift64BitWithOverflow1() {
   var t = 0xffffffff;
-  Expect.equals(0x10000000000000000, 2*(t+1) << 31); /// 03: static type warning
+  Expect.equals(0x10000000000000000, 2*(t+1) << 31); //# 03: static type warning
 }
 
 void testLeftShift64BitWithOverflow2() {
   var t = 0xffffffff;
-  Expect.equals(0x20000000000000000, 4*(t+1) << 31); /// 04: static type warning
+  Expect.equals(0x20000000000000000, 4*(t+1) << 31); //# 04: static type warning
 }
 
 void testLeftShift64BitWithOverflow3() {