Minor fission yield touch ups
Minor fission yield touch ups

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