issue 4817 fixed. Implemented raw strings with 'r' instead of '@' for dart2js

tests/compiler/dart2js/closure_codegen_test.dart

Index: tests/compiler/dart2js/closure_codegen_test.dart
diff --git a/tests/compiler/dart2js/closure_codegen_test.dart b/tests/compiler/dart2js/closure_codegen_test.dart
index 32a1c9c0494eaf18595b01b8a6bd925956a729a0..fc07210135246ae2a009fc04cf07fdf2e80345fd 100644
--- a/tests/compiler/dart2js/closure_codegen_test.dart
+++ b/tests/compiler/dart2js/closure_codegen_test.dart
@@ -6,28 +6,28 @@
 #import("compiler_helper.dart");
 #import("parser_helper.dart");
 
-const String TEST_INVOCATION0 = @"""
+const String TEST_INVOCATION0 = r"""
 main() {
   var o = null;
   o();
 }
 """;
 
-const String TEST_INVOCATION1 = @"""
+const String TEST_INVOCATION1 = r"""
 main() {
   var o = null;
   o(1);
 }
 """;
 
-const String TEST_INVOCATION2 = @"""
+const String TEST_INVOCATION2 = r"""
 main() {
   var o = null;
   o(1, 2);
 }
 """;
 
-const String TEST_BAILOUT = @"""
+const String TEST_BAILOUT = r"""
 class A {
   var x;
   foo() {
@@ -41,18 +41,18 @@ main() { new A().foo(); }
 
 closureInvocation() {
   String generated = compile(TEST_INVOCATION0);
-  Expect.isTrue(generated.contains(@".call$0()"));
+  Expect.isTrue(generated.contains(r".call$0()"));
   generated = compile(TEST_INVOCATION1);
-  Expect.isTrue(generated.contains(@".call$1(1)"));
+  Expect.isTrue(generated.contains(r".call$1(1)"));
   generated = compile(TEST_INVOCATION2);
-  Expect.isTrue(generated.contains(@".call$2(1, 2)"));
+  Expect.isTrue(generated.contains(r".call$2(1, 2)"));
 }
 
 // Make sure that the bailout version does not introduce a second version of
 // the closure.
 closureBailout() {
   String generated = compileAll(TEST_BAILOUT);
-  RegExp regexp = const RegExp(@'call\$0: function');
+  RegExp regexp = const RegExp(r'call\$0: function');
   Iterator<Match> matches = regexp.allMatches(generated).iterator();
   checkNumberOfMatches(matches, 1);
 }