Increase testing coverage to 100%

The current coverage report looks like:

Name                                           Stmts   Miss  Cover
------------------------------------------------------------------
ligo/followup_advocate/__init__.py               415     36    91%
ligo/followup_advocate/jinja.py                   15      0   100%
ligo/followup_advocate/templates/__init__.py       0      0   100%
ligo/followup_advocate/tool.py                    39      0   100%
------------------------------------------------------------------
TOTAL                                            469     36    92%

We should get all of these up to 100%.