coala-utils: Add coala's own unified_diff method
Add coala_unified_diff method which is same as difflib's unified_diff method but it checks for a newline at EOF.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Add coala_unified_diff method which is same as difflib's unified_diff method but it checks for a newline at EOF.