Eliminate superfluous triple double quotes

"""foo bar""" is exactly the same as "foo bar", but it is needlessly
long and leaves one wondering whether the quote triplification has some
deep meaning.

usr/share/rear/prep/RSYNC/default/150_check_rsync_protocol_version.sh

@@ -40,9 +40,9 @@ if [ "${RSYNC_USER}" != "root" ]; then
             _mntpt=$(ssh ${RSYNC_USER}@${RSYNC_HOST} 'cd ${RSYNC_PATH}; df -P .' 2>/dev/null | tail -1 | awk '{print $6}')
             ssh ${RSYNC_USER}@${RSYNC_HOST} "cd ${RSYNC_PATH} && touch .is_xattr_supported && setfattr -n user.comment -v 'File created by ReaR to test if this filesystems supports extended attributes.' .is_xattr_supported && getfattr -n user.comment .is_xattr_supported 1>/dev/null; find .is_xattr_supported -empty -delete"
             StopIfError "Remote file system $_mntpt does not have user_xattr mount option set!"
-            #BACKUP_RSYNC_OPTIONS+=( --xattrs --rsync-path="""rsync --fake-super""" )
+            #BACKUP_RSYNC_OPTIONS+=( --xattrs --rsync-path="rsync --fake-super" )
             # see issue #366 for explanation of removing --xattrs
-            BACKUP_RSYNC_OPTIONS+=( --rsync-path="""rsync --fake-super""" )
+            BACKUP_RSYNC_OPTIONS+=( --rsync-path="rsync --fake-super" )
         fi
     else
         if [ ${BACKUP_RSYNC_OPTIONS[@]/--fake-super/} != ${BACKUP_RSUNC_OPTIONS[@]} ]; then