Fix minifier to distinguish regexps from divisions (to some extent).

test/mjsunit/object-is.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Test both the Harmony egal operator and it's function equivalent.
 
 function TestEgal(expected, x, y) {
   // TODO(mstarzinger): Once we have the egal operator, we can test it here.
   assertSame(expected, Object.is(x, y));
 }
 
-var test_set = [ {}, [], 1/0, -1/0, "s", 0, 1/(-1/0), null, undefined ];
+var test_set = [ {}, [], 1/0, -1/0, "s", 0, 0/-1, null, undefined ];
 print(test_set);
 for (var i = 0; i < test_set.length; i++) {
   for (var j = 0; j < test_set.length; j++) {
     if (i == j) {
       assertSame(test_set[i], test_set[j]);
       TestEgal(true, test_set[i], test_set[j]);
     } else {
       TestEgal(false, test_set[i], test_set[j]);
       TestEgal(false, test_set[j], test_set[i]);
     }
   }
 }