Fix user warning message for "sudo -l command" when not allowed.

Reported by the sudo-rs project.

There was a missing space between "list" and the actual command.
This also changes the output to include the command as specified
by the user, not the path found in the path.  Previously, if the
command did not exist it would not be included in the message.

plugins/sudoers/logging.c

@@ -321,9 +321,17 @@ log_denial(unsigned int status, bool inform_user)
 	    sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s may not run "
 		"sudo on %s.\n"), user_name, user_srunhost);
 	} else {
+	    const char *cmnd1 = user_cmnd;
+	    const char *cmnd2 = "";
+
+	    if (ISSET(sudo_mode, MODE_CHECK)) {
+		/* For "sudo -l command" the command run is in NewArgv[1]. */
+		cmnd1 = "list ";
+		cmnd2 = NewArgv[1];
+	    }
 	    sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s is not allowed "
 		"to execute '%s%s%s%s' as %s%s%s on %s.\n"),
-		user_name, user_cmnd, list_cmnd ? list_cmnd : "",
+		user_name, cmnd1, cmnd2,
 		user_args ? " " : "", user_args ? user_args : "",
 		list_pw ? list_pw->pw_name : runas_pw ?
 		runas_pw->pw_name : user_name, runas_gr ? ":" : "",