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Fix up docstring
Sat, 26 Mar 2016 19:21:05 +0000, by Steve Losh
Fix the topological sorting
Sat, 26 Mar 2016 19:19:07 +0000, by Steve Losh

less more | at revision 38: (0) -30 -10 -2 +2 +10 +30 +100 tip