removed spaces in valgrind default tests
removed spaces in valgrind default tests

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