createPatch -> applyPatch failed.

```
var diff = require('./diff');

var oldtext = 'AAAAAAAAAAAAAAAA\n\n';
var newtext = 'AAAAAAAAAAAAAAAA\nBBBBBB' + String.fromCharCode(8232) + '\nCCCCCCCCCCCCCCCCCC\n\n';


var diffed = diff.createPatch('test', oldtext, newtext);
console.log(diff.applyPatch(oldtext, diffed) !== newtext ? 'failed' : 'success');
```

This code result must be success.
But It's failed.
