Fix typo.

app/filters.php

@@ -50,7 +50,7 @@ Route::filter('auth.basic', function()
 |--------------------------------------------------------------------------
 |
 | The "guest" filter is the counterpart of the authentication filters as
-| it simply checks the that current user is not logged in. A redirect
+| it simply checks that the current user is not logged in. A redirect
 | response will be issued if they are, which you may freely change.
 |
 */