Flowchart: Dense Duplicate Edges (TD)

Ten edges over three nodes, four of them duplicates of one pair (#2072). In the ASCII panel every edge keeps a lane and an arrowhead of its own, as Mermaid draws one path per edge, and the faces grow to hold them.

flowchart-dense-duplicate-edges-td.mmd
flowchart TD
  a["a"]
  b["b"]
  c["c"]
  a --> b
  a --> b
  a --> b
  a --> b
  b --> c
  b --> c
  a --> c
  a --> c
  c --> a
  c --> a
Output
Flowchart, Zombie Mermaid a b c

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