make penwidth=0 at the pointy end(s) of tapered edges (responding to #2391)
make penwidth=0 at the pointy end(s) of tapered edges (responding to #2391)

tkelman/graphviz,jho1965us/graphviz,pixelglow/graphviz,kbrock/graphviz,ellson/graphviz,jho1965us/graphviz,MjAbuz/graphviz,kbrock/graphviz,ellson/graphviz,jho1965us/graphviz,ellson/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,pixelglow/graphviz,pixelglow/graphviz,jho1965us/graphviz,tkelman/graphviz,MjAbuz/graphviz,kbrock/graphviz,jho1965us/graphviz,pixelglow/graphviz,tkelman/graphviz,BMJHayward/graphviz,MjAbuz/graphviz,ellson/graphviz,pixelglow/graphviz,pixelglow/graphviz,tkelman/graphviz,tkelman/graphviz,MjAbuz/graphviz,pixelglow/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,kbrock/graphviz,BMJHayward/graphviz,kbrock/graphviz,jho1965us/graphviz,MjAbuz/graphviz,pixelglow/graphviz,MjAbuz/graphviz,kbrock/graphviz,jho1965us/graphviz,jho1965us/graphviz,kbrock/graphviz,BMJHayward/graphviz,tkelman/graphviz,kbrock/graphviz,pixelglow/graphviz,jho1965us/graphviz,kbrock/graphviz,pixelglow/graphviz,tkelman/graphviz,tkelman/graphviz,BMJHayward/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,tkelman/graphviz,jho1965us/graphviz,MjAbuz/graphviz,MjAbuz/graphviz,BMJHayward/graphviz,BMJHayward/graphviz,tkelman/graphviz,BMJHayward/graphviz,jho1965us/graphviz,tkelman/graphviz,ellson/graphviz,kbrock/graphviz,pixelglow/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,kbrock/graphviz