mongo.js

$ mongo
MongoDB shell version: 2.0.0
connecting to: test
> quit
function () {
    return nativeHelper.apply(quit_, arguments);
}
> quit.toString = function() { return 'Type quit() to quit.'; }
function () {
    return "Type quit() to quit.";
}
> quit
Type quit() to quit.
> quit.toString = function() { quit(); }
function () {
    quit();
}
> quit
$