danmayer/churn — pull request #14 by riethmayer (2012-11-07 15:32:14+00:00)
Title: Send params only for set environment variables.

Given ENV['CHURN_IGNORE_FILES'] is empty
Then :ignore_files will be provided with nil.
And options.fetch(:ignore_files) { "" } => nil

This breaks `@ignore_files = (options.fetch(:ignore_files){ "" }).split(',').map(&:strip)` in churn_calculator's initializer, with nil.split.