Label on edge causes issue with GraphViz 2.40.1
Putting a label on edge sometimes creates strange results with GraphViz 2.40.1: the generated edge is very long.
The same DOT source works fine with GrappViz 2.38
Removing the label on the edge also solves the issue.
You can try with this snippet:
digraph unix {
nodesep=0.486111;
ranksep=0.833333;
remincross=true;
searchsize=500;
subgraph cluster4p0 {label="";subgraph cluster4 {style=solid;color="0000004";label=<<TABLE BGCOLOR="0000005" FIXEDSIZE="TRUE" WIDTH="60" HEIGHT="12"><TR><TD></TD></TR></TABLE>>;
subgraph cluster4p1 {label="";
sh0006 [shape=rect,label="",width=0.944444,height=0.666667,color="0000006"];
sh0007 [shape=rect,label="",width=0.722222,height=0.666667,color="0000007"];
}}}
sh0006->sh0007[arrowtail=none,arrowhead=empty,arrowsize=2.0,minlen=1,color="0000008",label=<<TABLE BGCOLOR="0000009" FIXEDSIZE="TRUE" WIDTH="69" HEIGHT="18"><TR><TD></TD></TR></TABLE>>];
}
Thanks