dbt trying to parse tags in analyses even when wrapped in raw tags

[clrcrl]

Issue

Steps to Reproduce

1. Put an unknown tag within raw tags in a sql file, in your analysis directory (note that the bug doesn't occur in a model).

{% raw %}
{% form %}
date_part:
    type: select
    default: day
    options: [hour, day, week, month]
{% endform %}
{% endraw %}

2. run dbt compile

Expected Result

The following should be compiled:

{% form %}
date_part:
    type: select
    default: day
    options: [hour, day, week, month]
{% endform %}

Actual Result

Error on compilation:

Found 0 models, 0 tests, 0 archives, 1 analyses, 122 macros, 2 operations, 0 seed files

10:56:47 | Concurrency: 1 threads (target='dev')
10:56:47 |
Encountered an error:
Runtime Error
  Compilation Error in analysis form_tag (analysis/analysis/form_tag.sql)
    Encountered unknown tag 'form'.
      line 2
        {% form %}

System information

OS: MacOS Mojave
Python 3.7.1
dbt 0.12.1