puppetlabs/puppet-specifications — pull request #3 by zaphod42 (2014-06-27 18:19:32+00:00)
Title: (PUP-1811) The match variables are set for in

We had previous not set the match variables for `in` expressions, but
PUP-1811 changes that. This updates the specification to allow for that
and specifies which value with be used to populate the match variables
for the cases of Array and Hash.