assemble: fix name detection with hyphens, Fix #1507

Signed-off-by: Luca Di Maio <[email protected]>

distrobox-assemble

@@ -325,7 +325,7 @@ run_distrobox()
 	# If distrobox already exist, and we have replace enabled, destroy the container
 	# we have to recreate it.
 	# shellcheck disable=SC2086,2248
-	if "${distrobox_path}"/distrobox-list ${root_flag} | grep -qw "${name} " && [ "${dryrun}" -eq 0 ]; then
+	if "${distrobox_path}"/distrobox-list ${root_flag} | grep -qw " ${name} " && [ "${dryrun}" -eq 0 ]; then
 		printf >&2 "%s already exists\n" "${name}"
 		return 0
 	fi