weswigham/metalsmith-metallic — pull request #4 by hurrymaplelad (2014-10-03 07:34:14+00:00)
Title: Tolerate whitespace when matching language

Github tolerates whitespace before the language for a code block, so

```js
var x;
```

and

``` js
var x;
```

both generate

``` js
var x;
```

Let's do the same thing.