mbostock/d3 — pull request #1358 by mbostock (2013-07-02 16:11:27+00:00)
Title: By default, enter-insert before updating sibling.

Fixes #744. This implements a default `before` selector such that when entering elements are inserted (e.g., enter.insert("div")), they are inserted before the next following sibling in the update selection, if any. This change does not affect the behavior of append, so as to preserve backwards-compatibility, and likewise does not affect the behavior of insert on non-enter selections.