The generated svg files from dot (recently changed to svg from png) is unfortunately not deterministic, but random changes (that does not affect svg rendering) is creeping into them. This makes our comparison script pick up differences and report them as failures.

I believe this is something that should really be fixed by the GraphViz team, and I have filed https://gitlab.com/graphviz/graphviz/issues/1614.

However, we cannot wait for them to eventually fix it. So we need to filter out SVG files from our compare script. If the GraphViz issue is ever fixed, we can remove that exception.