RobotLocomotion/drake — pull request #499 by mposa (2014-10-23 14:54:47+00:00)
Title: Fixes to DoubleIntegrator example code plotting.

britain88 in the edX course noticed this issue, here's the fix:

https://courses.edx.org/courses/MITx/6.832x/3T2014/discussion/forum/i4x-MITx-6_832x-w2-p3/threads/544909b435c79cafbe0002dd