Add message about compiler generated dependencies.

Makefile

@@ -237,15 +237,18 @@ help:
 # myclass.o: myclass.cpp myclass.h $(HEADERS)
 # project5.o: project5.cpp myclass.o $(HEADERS)
 #
-# ADD YOUR OWN DEPENDENCIES HERE
-
+# SOME EXAMPLES
+#
 #test_thing: test_thing.cpp class.o functions.o
-
 #class.o: class.cpp class.h
-
 #functions.o: functions.cpp functions.h
-
 #project0.o: project0.cpp class.h functions.h
+#
+# THE COMPILER CAN GENERATE DEPENDENCIES FROM SOURCE CODE
+#
+# % g++ -MM *.cpp
+#
+# ADD YOUR OWN DEPENDENCIES HERE
 
 ######################
 # TODO (end) #