fixed white space issue

lib/sequelize.js

@@ -176,7 +176,7 @@ module.exports = (function() {
       replication: this.options.replication,
       dialectModulePath: this.options.dialectModulePath,
       maxConcurrentQueries: this.options.maxConcurrentQueries,
-	  keepDefaultTimezone: this.options.keepDefaultTimezone,
+      keepDefaultTimezone: this.options.keepDefaultTimezone,
       dialectOptions: this.options.dialectOptions
     };