Cleaning up some numpy docstring formatting.
Cleaning up some numpy docstring formatting.

smharper/openmc,walshjon/openmc,paulromano/openmc,shikhar413/openmc,amandalund/openmc,amandalund/openmc,shikhar413/openmc,paulromano/openmc,walshjon/openmc,smharper/openmc,walshjon/openmc,mit-crpg/openmc,liangjg/openmc,shikhar413/openmc,wbinventor/openmc,liangjg/openmc,paulromano/openmc,shikhar413/openmc,mit-crpg/openmc,wbinventor/openmc,wbinventor/openmc,smharper/openmc,paulromano/openmc,liangjg/openmc,amandalund/openmc,mit-crpg/openmc,amandalund/openmc,liangjg/openmc,smharper/openmc,wbinventor/openmc,mit-crpg/openmc,walshjon/openmc