alphagov/spotlight — pull request #157 by annapowellsmith (2014-01-16 15:31:35+00:00)
Title: Handle null data points gracefully in completion rate graphs

Pivotal: https://www.pivotaltracker.com/s/projects/911874/stories/63960878

Simple change to ensure that we don't attempt to divide by zero or by NaN in our completion_rate graphs, when Backdrop returns nulls. Tests are also updated.