Abjad/abjad — pull request #380 by tiagoantao (2014-04-14 12:33:13+00:00)
Title: A next and a sort

Hi,

Have a look at the sort. Python3 does not sort values of different type. In this case, I am converting Nones to very negative numbers (to mimick P2 behaviour)

5 tests for full pass...