Block parser mismatched with jinja: docs blocks

[drewbanin]

Describe the bug

I don't totally understand the nature of this error, but it appears to be an internal error. Given a .md file like:

{%- docs doc1 -%}

    {% raw %}

    ```sql
        {{ doc_ex_1(date_column='i.date_sk', time_column='i.time_sk') }}
    ```

    {% endraw %}

{%- enddocs -%}


{%- docs doc2 -%}

    {% raw %}

    ```sql
        {{ doc_ex_2(date_column='i.date_sk', time_column='i.time_sk') }}
    ```

    {% endraw %}

{%- enddocs -%}

Calling dbt docs generate will result in:

Got 2 docs in an extracted docs block: block parser mismatched with jinja

I think this might have something to do with the raw tags in this example file.

The output of dbt --version:

0.16.0