consistently use spaces around operators (pep8). removed trailing white spaces.
consistently use spaces around operators (pep8). removed trailing white spaces.

qutip/qutip,anubhavvardhan/qutip,anubhavvardhan/qutip,qutip/qutip,cgranade/qutip,zasdfgbnm/qutip,zasdfgbnm/qutip,cgranade/qutip