joyent/node — pull request #4578 by fb55 (2013-01-12 19:34:03+00:00)
Title: repl: make built-in modules available by default

Previously:
```js
> fs
> fs.readdirSync()
```

Now:
```js
> fs.readdirSync()
```

The modules are still lazy-loaded, but without the need of a direct reference.