Fix formatting errors in datagrids module according to PEP8
Review Request #6629 — Created Nov. 23, 2014 and submitted
Fixed the following format errors:
datagrids/columns.py:460:27: E251 unexpected spaces around keyword / parameter equals
datagrids/columns.py:460:29: E251 unexpected spaces around keyword / parameter equals
datagrids/grids.py:166:5: E303 too many blank lines (2)
datagrids/grids.py:167:80: E501 line too long (94 > 79 characters)
datagrids/views.py:177:50: W292 no newline at end of file
Ran unit tests for datagrids module, and ran pep8 again.