[Modify] Polish it

Author: sta

websocket-sharp/Net/CookieCollection.cs

@@ -786,17 +786,20 @@ public bool Remove (Cookie cookie)
     {
       if (_readOnly) {
         var msg = "The collection is read-only.";
+
         throw new InvalidOperationException (msg);
       }
 
       if (cookie == null)
         throw new ArgumentNullException ("cookie");
 
       var idx = search (cookie);
+
       if (idx == -1)
         return false;
 
       _list.RemoveAt (idx);
+
       return true;
     }