Apply templated write_message to mesh.cpp
Apply templated write_message to mesh.cpp

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