Added howto= at the end to show how to execute this i.e. generate input for:
Added howto= at the end to show how to execute this i.e. generate input for:

cctbx.python run_indexing_api.py /tmp/sweep.json /tmp/refl.pkl

dials/dials,dials/dials,dials/dials,dials/dials,dials/dials