GitLab

added test files

This reverts commit df123ba1.

IMHO, this is more about presentation than logic, so it belongs
in Jinja.

Reformatted JSON data files using the json module from the Python
standard library:

    >>> import glob
    >>> import json
    >>> for filename in glob.glob('**/*.json', recursive=True):
    ...     with open(filename, 'r') as f:
    ...         data = json.load(f)
    ...     with open(filename, 'w') as f:
    ...         json.dump(data, f, indent=4)
    ...