mbostock/d3 — pull request #760 by jasondavies (2012-08-11 17:10:32+00:00)
Title: Add d3.interpolateStringMissing.

Instead of immediately replacing missing start numbers with the corresponding end numbers, d3.interpolateStringMissing interpolates from an arbitrary starting number to each end number.

This is especially useful for working around some browsers that automatically remove optional zeroes from the SVG transform attribute. Rather than using d3.tween with d3.interpolateString, d3.interpolateStringMissing(0) should be more robust.

See #746.