Handle NULL value
Summary:
The dump didn't handle the NULL type.
This created an issue, as a NULL value in JavaScript:
- is an object (sic)
- doesn't have a constructor property in prototype
Test Plan:
runas: {{ bot['runas'] | default('') }}
now renders as runas: NULL.
Reviewers: dereckson
Reviewed By: dereckson
Differential Revision: https://devcentral.nasqueron.org/D2563