Shortened nuclide slice block and added docstring to Tally.slice
Shortened nuclide slice block and added docstring to Tally.slice

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