Fix an invalid character escape sequence.

runtime/vm/unicode_test.cc

 // Copyright (c) 2011, 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.
 
 #include "vm/globals.h"
 #include "vm/unicode.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
@@ skipping 961 matching lines @@
     uint32_t expected[] = { 0xDB80, 0xDFFF };
     uint32_t dst[ARRAY_SIZE(expected)];
     memset(dst, 0, sizeof(dst));
     bool is_valid = Utf8::Decode(src, dst, ARRAY_SIZE(dst));
     EXPECT(!is_valid);
     EXPECT(memcmp(expected, dst, sizeof(expected)));
   }
 
   // 5.2.7 - U+DBFF U+DC00 = ed af bf ed b0 80 = "\xED\xAF\xBF\xED\xB0\x80"
   {
-    const char* src = "\xED\xAF\xBF\ED\xB0\x80";
+    const char* src = "\xED\xAF\xBF\xED\xB0\x80";
     uint32_t expected[] = { 0xDBFF, 0xDC00 };
     uint32_t dst[ARRAY_SIZE(expected)];
     memset(dst, 0, sizeof(dst));
     bool is_valid = Utf8::Decode(src, dst, ARRAY_SIZE(dst));
     EXPECT(!is_valid);
     EXPECT(memcmp(expected, dst, sizeof(expected)));
   }
 
   // 5.2.8 - U+DBFF U+DFFF = ed af bf ed bf bf = "\xED\xAF\xBF\xED\xBF\xBF"
   {
@@ skipping 25 matching lines @@
     uint32_t expected[] = { 0xFFFF };
     uint32_t dst[ARRAY_SIZE(expected)];
     memset(dst, 0, sizeof(dst));
     bool is_valid = Utf8::Decode(src, dst, ARRAY_SIZE(dst));
     EXPECT(is_valid);
     EXPECT(!memcmp(expected, dst, sizeof(expected)));
   }
 }
 
 }  // namespace dart