fix sed Branch

lib/util-base.sh

@@ -322,7 +322,7 @@ install_base() {
                 sed -i "/Branch =/c\Branch = $(cat ${BRANCH})/" ${MOUNTPOINT}/etc/pacman-mirrors.conf 2>$ERR
                 check_for_error "set target branch $(cat ${BRANCH})" $?
             else
-                sed -i "/Branch =/c$(grep "Branch =" /etc/pacman-mirrors.conf)" ${MOUNTPOINT}/etc/pacman-mirrors.conf 2>$ERR
+                sed -i "/Branch =/c\Branch = $(grep "Branch =" /etc/pacman-mirrors.conf)" ${MOUNTPOINT}/etc/pacman-mirrors.conf 2>$ERR
                 check_for_error "use host branch: $(grep "Branch =" /etc/pacman-mirrors.conf | cut -d' ' -f3)" $?
             fi
             touch /mnt/.base_installed