shortened setting of xs shapes
shortened setting of xs shapes

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