secret: fix secret env -- usage

commands/secret

@@ -125,6 +125,11 @@ function secret_() (
 		'--no-quiet'* | '--quiet'* | '--no-verbose'* | '--verbose'*) ;; # handled by is-quiet-enabled
 		'signin') action='login' ;;
 		'signout') action='logout' ;;
+		'--')
+			args+=("$@")
+			shift $#
+			break
+			;;
 		*)
 			if test -z "$action"; then
 				action="$item"
@@ -734,20 +739,24 @@ function secret_() (
 	}
 
 	function secret_env {
-		local before=() after=() found='no' args arg
+		local before=() after=() found='no' args item
 		local keys key value
 		local env_secrets env_args env_arg
 
-		for arg in "$@"; do
-			if test "$arg" = '--'; then
+		while test "$#" -ne 0; do
+			item="$1"
+			shift
+			case "$item" in
+			'--')
 				found='yes'
-				continue
-			fi
-			if test "$found" = 'yes'; then
-				after+=("$arg")
-			else
-				before+=("$arg")
-			fi
+				after+=("$@")
+				shift $#
+				break
+				;;
+			*)
+				before+=("$item")
+				;;
+			esac
 		done
 
 		if test "$found" = 'yes' && is-array-full "${before[@]}" && is-array-full "${after[@]}"; then