Apply applies a Patch (list of diffs) to a graph.

Diff traverses two graphs simultaneously looking for differences.

PrintDiff writes a textual reprensentation of the diff from |v1| to |v2| to |w|.

Summary prints a summary of the diff between two values to stdout.

Difference represents a "diff" between two Noms graphs.

Patch is a list of difference objects that can be applied to a graph using ApplyPatch().