PEP8 change to whitespace in parenthesis, fits file opens inside with loop, and addition of pull request URL to docstring in test_array_broadcasting unittest.
PEP8 change to whitespace in parenthesis, fits file opens inside with loop, and addition of pull request URL to docstring in test_array_broadcasting unittest.

embray/PyFITS,embray/PyFITS,embray/PyFITS,embray/PyFITS,spacetelescope/PyFITS,spacetelescope/PyFITS