Correct a misnomer regarding supplementary code points.

runtime/vm/object_test.cc

 // Copyright (c) 2012, 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 "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/object_store.h"
@@ skipping 1294 matching lines @@
     };
     const String& str = String::Handle(String::New(src));
     EXPECT(str.IsTwoByteString());
     intptr_t expected_size = sizeof(expected) / sizeof(expected[0]);
     EXPECT_EQ(expected_size, str.Length());
     for (int i = 0; i < str.Length(); ++i) {
       EXPECT_EQ(expected[i], str.CharAt(i));
     }
   }
 
-  // Create a SMP 2-byte string from a UTF-8 string literal.
+  // Create a 2-byte string with supplementary characters from a UTF-8
+  // string literal.
   {
     const char* src =
         "\xF0\x9D\x91\xA0\xF0\x9D\x91\xA1"
         "\xF0\x9D\x91\xA2\xF0\x9D\x91\xA3";
     const intptr_t expected[] = { 0xd835, 0xdc60, 0xd835, 0xdc61,
                                   0xd835, 0xdc62, 0xd835, 0xdc63 };
     const String& str = String::Handle(String::New(src));
     EXPECT(str.IsTwoByteString());
     intptr_t expected_size = (sizeof(expected) / sizeof(expected[0]));
     EXPECT_EQ(expected_size, str.Length());
@@ skipping 1760 matching lines @@
   isolate->heap()->CollectAllGarbage();
   EXPECT(weak1.key() == Object::null());
   EXPECT(weak1.value() == Object::null());
   EXPECT(weak2.key() == Object::null());
   EXPECT(weak2.value() == Object::null());
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart