sparklemotion/nokogiri — pull request #1050 by nathanl (2014-02-13 21:14:23+00:00)
Title: Bang finder methods - raise if element is nil.

Add 'at!', 'at_css!', and 'at_xpath!' to Node and NodeSet.
Each bang method simply calls its non-bang counterpart and
either returns its value or, if that value is nil, raises
Nokogiri::XML::NotFound.

Fixes https://github.com/sparklemotion/nokogiri/issues/1045