Merge pull request #150 from xexyl/typo-mullender

Typo fix in 1984/mullender/Makefile

We are approving pending valid updates to the winner repository as
a prerequisite for preparing for the inclusion of **IOCCC28** winning
entries.

**NOTE**: All subsequent pull requests (beyond the set we will now approve)
will be considered after the publication of the **IOCCC28** winning entries
and after a suitable IOCCC vacation for the IOCCC judges and staff.

1984/mullender/Makefile

@@ -137,7 +137,7 @@ ${PROG}: ${PROG}.c
 	@echo
 	@echo "and then running:"
 	@echo
-	@echo "    ./ ${ALT_TARGET}"
+	@echo "    ./${ALT_TARGET}"
 	@echo
 	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}