mbostock/d3 — pull request #642 by jasondavies (2012-05-09 21:07:50+00:00)
Title: "Bundle" interpolation for single-element arrays.

Probably a better fix than #640.

In future we may want to generate some kind of loop, but it's not clear what orientation such a loop should have, so perhaps a "non-line" like this is better as a default.