Flowchart: Dense Duplicate Edges (LR)
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-lr.mmd
flowchart LR
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