seattlerb/sexp_processor — pull request #4 by presidentbeef (2011-12-24 03:42:20+00:00)
Title: Add a test for a bare hash at end of array (1.9)

Apparently this is a thing now:

$ ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [i686-linux]

$ ruby -e "p [:a, :b, :c => :d]"
[:a, :b, {:c=>:d}]