Nothing
A dot
-example taken from the man-pages. You need to install the graphviz
package.
digraph test123 { a -> b -> c; a -> {x y}; b [shape=box]; c [label="hello\nworld",color=blue,fontsize=24, fontname="Palatino-Italic",fontcolor=red,style=filled]; a -> z [label="hi", weight=100]; x -> z [label="multi-line\nlabel"]; edge [style=dashed,color=red]; b -> x; {rank=same; b x} }
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