Specifies the width of the pen, in points, used to draw lines and curves
type: double, default:
including the boundaries of edges and clusters.
penwidth value is inherited by subclusters, and has no effect on text.
Previous to 31 January 2008, the effect of
penwidth=W was achieved by
setlinewidth(W) as part of a
If both attributes are set,
penwidth will be used.
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Last modified June 12, 2022: add simple descriptions for attributes (b2a18ac)