How can I type a newline using the LaTeX Graphviz package?

Question

I am using the Graphviz package (usepackage[pdf]{graphviz}) for my LaTeX document.
I am unable to break lines in my nodes.
My code:
digraph{contract}{
    rankdir = "LR";
    computeSumParam0[label = "computeSum: n param #0"];
}

This renders the characters n on the PDF literally.
If I instead use n, LaTeX fails to compile because the command n does not exist.

egreg · Accepted Answer

You can use noexpandn, or wrap it in a macro for better clarity:
documentclass{article}
usepackage[pdf]{graphviz}

begin{document}

digraph{contract}{
    rankdir = "LR";
    computeSumParam0[label = "computeSum: noexpandn param #0"];
}

end{document}

or
documentclass{article}
usepackage[pdf]{graphviz}

newcommand{gvnewline}{noexpandn}

begin{document}

digraph{contract}{
    rankdir = "LR";
    computeSumParam0[label = "computeSum: gvnewline param #0"];
}

end{document}

gigiair · Answer

Just create a new line in the label text!
digraph{contract}{
 rankdir="LR";
 computeSumParam0[label="computeSum:
                         param #0"];
  }

How can I type a newline using the LaTeX Graphviz package?

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