Using a "with" statement does not close the tag properly

Example:

```
- with some_context
  ...
- with some_other_context
  ...
```

Gets compiled to:

```
{% with some_context %}
  ...
{% with some_other_context %}
  ...
{% endwith %}
{% endwith %}
```

Should be:

```
{% with some_context %}
  ...
{% endwith %}
{% with some_other_context %}
  ...
{% endwith %}
```