[graphviz-interest] How do I make 3 edges meet seamlessly at a point?

Hi

This is dot - graphviz version 2.38.0 (20140413.2041).

The best I can do is:

digraph Perl
{
graph [ rankdir="TB" ]
node [ shape="oval" ]
edge [ color="grey" ]
node [ shape="oval" style="filled" ]
"Carnegie" [ color="aquamarine" ]
"Murrumbeena" [ color="bisque" ]
"Oakleigh" [ color="blueviolet" ]
"one" [ fixedsize="shape" height="0" style="invis" width="0" ]
"Murrumbeena" -> "one" [ arrowhead="none" samehead="1" ]
"Carnegie" -> "one" [ arrowhead="none" samehead="1" ]
"one" -> "Oakleigh" [ sametail="1" ]
}

But this leaves a small gap at the top of the vertical edge.

Is there some option which forces this gap to vanish?

-- 
Ron Savage - savage.net.au
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