bug fixed in geometry.rst
bug fixed in geometry.rst

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