Backport PR #16113 on branch v3.2.x (Renderer Graphviz inheritance diagrams as svg)#16122

NelleV merged 1 commit intomatplotlib:v3.2.xmatplotlib/matplotlib:v3.2.xfrom

meeseeksmachine:auto-backport-of-pr-16113-on-v3.2.xmeeseeksmachine/matplotlib:auto-backport-of-pr-16113-on-v3.2.xCopy head branch name to clipboard