Use tab to indent code instead of spaces

main.c

@@ -3736,7 +3736,7 @@ static void fork_monitor()
 		exit(1);
 	}
 
-        // Don't let a dying monitor kill the main process
+	// Don't allow a dying monitor to kill the main process
 	sighandler_t sr = signal(SIGPIPE, SIG_IGN);
 	if (SIG_ERR==sr) {
 		perror("signal - failed to edit signal mask for --monitor");