Correct file names for tests in tests/language.

tests/language/mint_arithmetic_test.dart

 // 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.
 
 // Test arithmetic on 64-bit integers.
 
 test_and_1() {
   try {  // Avoid optimizing this function.
     f(a, b) {
       var s = b;
@@ skipping 53 matching lines @@
     var y  = 0xffffffffffffffff;
     Expect.equals(-1, f(y, -1));  // Triggers deoptimization.
   } finally { }
 }
 
 test_func(x, y) => (x & y) + 1.0;
 
 test_mint_double_op() {
   for (var i=0; i<10000; i++) test_func(4294967295, 1);
   Expect.equals(2.0, test_func(4294967295, 1));
-  Expect.equals(4294967296.0, test_func(4294967295, 1));
 }
 
 main() {
   for (var i = 0; i < 5; i++) {
     test_and_1();
     test_and_2();
     test_xor_1();
     test_or_1();
     test_mint_double_op();
   }
 }