diff package:filestore

Return a unified diff of two revisions of a named resource. Format of the diff is a list [(Diff, [String])], where DI is F (in first document only), S (in second only), or B (in both), and the list is a list of lines (without newlines at the end).

This is PolyDiff specialized so both sides are the same type.

A value is either from the First list, the Second or from Both. Both contains both the left and right values, in case you are using a form of equality that doesn't check all data (for example, if you are using a newtype to only perform equality on side of a tuple).