Adding comments to plot test for clarity.
Adding comments to plot test for clarity.

shikhar413/openmc,wbinventor/openmc,wbinventor/openmc,wbinventor/openmc,liangjg/openmc,smharper/openmc,walshjon/openmc,shikhar413/openmc,liangjg/openmc,smharper/openmc,mit-crpg/openmc,walshjon/openmc,mit-crpg/openmc,walshjon/openmc,smharper/openmc,wbinventor/openmc,shikhar413/openmc,paulromano/openmc,smharper/openmc,amandalund/openmc,johnnyliu27/openmc,mit-crpg/openmc,johnnyliu27/openmc,amandalund/openmc,paulromano/openmc,paulromano/openmc,liangjg/openmc,liangjg/openmc,johnnyliu27/openmc,shikhar413/openmc,amandalund/openmc,walshjon/openmc,mit-crpg/openmc,paulromano/openmc,amandalund/openmc,johnnyliu27/openmc