Add tool for visually comparing test results. This is needed when the strucural comparison fails.
Add tool for visually comparing test results.
This is needed when the strucural comparison fails.

dspinellis/UMLGraph,davidmoten/UMLGraph,davidmoten/UMLGraph,Edd123/UMLGraph,Edd123/UMLGraph,davidmoten/UMLGraph,Edd123/UMLGraph,dspinellis/UMLGraph,dspinellis/UMLGraph