fixed indentation of PETSC_DOUBLE variable
fixed indentation of PETSC_DOUBLE variable

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