[borg] fix whitespace issue

handlers/borg.in

@@ -151,7 +151,7 @@ fi
 ### REMOVE OLD BACKUPS ###
 
 # borg prune
-if [ "$prune" == "yes" ]; then
+if [ "$prune" == "yes" ]; then
   prunestr="borg prune --keep-hourly $keephourly --keep-daily $keepdaily --keep-weekly $keepweekly --keep-monthly $keepmonthly $execstr_repository"
   debug "$prunestr"
    if [ $test = 0 ]; then