when opening separate source file, read filetype first
when opening separate source file, read filetype first

amandalund/openmc,paulromano/openmc,walshjon/openmc,smharper/openmc,paulromano/openmc,walshjon/openmc,johnnyliu27/openmc,lilulu/openmc,wbinventor/openmc,shenqicang/openmc,sxds/opemmc,shikhar413/openmc,nhorelik/openmc,lilulu/openmc,nhorelik/openmc,amandalund/openmc,johnnyliu27/openmc,wbinventor/openmc,samuelshaner/openmc,johnnyliu27/openmc,mjlong/openmc,kellyrowland/openmc,liangjg/openmc,lilulu/openmc,mit-crpg/openmc,paulromano/openmc,walshjon/openmc,liangjg/openmc,shenqicang/openmc,johnnyliu27/openmc,smharper/openmc,liangjg/openmc,samuelshaner/openmc,bhermanmit/openmc,sxds/opemmc,amandalund/openmc,kellyrowland/openmc,mjlong/openmc,shikhar413/openmc,bhermanmit/openmc,smharper/openmc,shikhar413/openmc,samuelshaner/openmc,wbinventor/openmc,wbinventor/openmc,samuelshaner/openmc,paulromano/openmc,amandalund/openmc,mit-crpg/openmc,mit-crpg/openmc,liangjg/openmc,walshjon/openmc,shikhar413/openmc,mit-crpg/openmc,smharper/openmc