Bug report: Demo doesn't handle whitespace correctly.

**This is a bug report only, I don't have a fix for it.**

template:
```
FOO

    {{#section}}BAR{{/section}}
```

data:
```
section: [""]
```

Expected result (this also the *actual* result from the main Ruby commandline mustache tool):
```
FOO

    BAR
```

Actual result on <http://mustache.github.com/#demo>:
```
FOO
BAR
```