Strip whitespace from travis variables
Strip whitespace from travis variables

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