Function diffGraphsToMermaid

diffGraphsToMermaid(
    left: LabeledDiffGraph,
    right: LabeledDiffGraph,
    prefix: string,
): string
uses same id map but ensures, it is different from the rhs so that mermaid can work with that
Parameters
- left: LabeledDiffGraph
- right: LabeledDiffGraph
- prefix: string
Returns string
- Defined in src/util/mermaid/dfg.ts:343