add backup file extension to sed for compatibility with native OSX version
add backup file extension to sed for compatibility with native OSX version

macarthur-lab/xbrowse,ssadedin/seqr,macarthur-lab/seqr,macarthur-lab/seqr,macarthur-lab/xbrowse,macarthur-lab/seqr,macarthur-lab/xbrowse,ssadedin/seqr,macarthur-lab/xbrowse,ssadedin/seqr,macarthur-lab/seqr,ssadedin/seqr,macarthur-lab/seqr,macarthur-lab/xbrowse,ssadedin/seqr,macarthur-lab/xbrowse