standard completion scheme for ssh-copy-id

contrib/ssh

@@ -179,16 +179,18 @@ _ssh_copy_id() {
 	prev=${COMP_WORDS[COMP_CWORD-1]}
 
 	case "$prev" in
-		-*i)
-		_filedir
-		;;
-	*)
-		_known_hosts -a
-
-		[ $COMP_CWORD -eq 1 ] || \
-			COMPREPLY=( "${COMPREPLY[@]}" $( compgen -- $cur ) )
+		-i)
+			_filedir
+			return 0
+			;;
 	esac
 
+	if [[ "$cur" == -* ]]; then
+		COMPREPLY=( $( compgen -W '-i' -- $cur ) )
+	else
+		_known_hosts -a
+	fi
+
 	return 0
 }
 complete -F _ssh_copy_id $filenames ssh-copy-id