Fix small mistake in d8.js.

src/d8.js

 // Copyright 2008 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 1002 matching lines @@
 
     // Check for:
     //   en[able] exc[eptions] [all|unc[aught]]
     //   dis[able] exc[eptions] [all|unc[aught]]
     if (arg1 == 'exc' || arg1 == 'exception' || arg1 == 'exceptions') {
 
       var arg2 = (nextPos > 0) ?
           args.substring(nextPos + 1, args.length) : 'all';
       if (!arg2) {
         arg2 = 'all'; // if unspecified, set for all.
-      } if (arg2 == 'unc') { // check for short cut.
+      } else if (arg2 == 'unc') { // check for short cut.
         arg2 = 'uncaught';
       }
       excType = arg2;
 
     // Check for:
     //   en[able] [all|unc[aught]] exc[eptions]
     //   dis[able] [all|unc[aught]] exc[eptions]
     } else if (arg1 == 'all' || arg1 == 'unc' || arg1 == 'uncaught') {
 
       var arg2 = (nextPos > 0) ?
@@ skipping 1210 matching lines @@
         if ("set" in desc) {
           var setter = desc.set.toString();
           props.push("set " + name + setter.slice(setter.indexOf('(')));
         }
       }
       return "{" + props.join(", ") + "}";
     default:
       return "[crazy non-standard shit]";
   }
 }