madrobby/zepto — pull request #758 by chennney (2013-05-24 22:36:31+00:00)
Title: Gracefully handle undefined name parameter in $.fn.data()

jQuery handles $el.data() by returning an empty object, but I matched the other test assertions for data keys that don't have values set by returning undefined.

Encountered this when using Bootstrap's modal.js with Zepto 1.0.