Fix flake8 error of multiple # (E266)

[bobleesj]

Test passes:

OK (skipped=30)
imac@imacs-iMac diffpy.srfit % python -m diffpy.srfit.tests.run
WARNING:diffpy.srfit.tests:No module named 'sas', SaS tests skipped.
WARNING:diffpy.srfit.tests:Cannot import diffpy.structure, Structure tests skipped.
WARNING:diffpy.srfit.tests:Cannot import pyobjcryst, pyobjcryst tests skipped.
WARNING:diffpy.srfit.tests:Cannot import diffpy.srreal, PDF tests skipped.
......ssss...........sss..................sssssssssss....ssssss...........................ssssss..............
----------------------------------------------------------------------
Ran 110 tests in 0.183s

OK (skipped=30)

[bobleesj]

Please review @sbillinge