fix using man(1) with multiple pages

PR: 275978
Reported by: Mohamed Akram
Fixes: 789480702e
MFC after: 1 week

usr.bin/man/man.sh

@@ -1040,7 +1040,7 @@ do_man() {
 		do_full_search "${REGEXP}"
 	fi
 
-	for page in "$pages"; do
+	for page in "$@"; do
 		decho "Searching for \"$page\""
 		man_find_and_display "$page"
 	done