Add initial tests for nbgrader list
Add initial tests for nbgrader list

EdwardJKim/nbgrader,modulexcite/nbgrader,ellisonbg/nbgrader,alope107/nbgrader,EdwardJKim/nbgrader,jhamrick/nbgrader,ellisonbg/nbgrader,jupyter/nbgrader,jupyter/nbgrader,jhamrick/nbgrader,ellisonbg/nbgrader,jupyter/nbgrader,dementrock/nbgrader,modulexcite/nbgrader,alope107/nbgrader,jupyter/nbgrader,EdwardJKim/nbgrader,MatKallada/nbgrader,dementrock/nbgrader,jhamrick/nbgrader,jupyter/nbgrader,jhamrick/nbgrader,ellisonbg/nbgrader,EdwardJKim/nbgrader,MatKallada/nbgrader