--- a/progs/C4.c	Tue Oct 08 13:01:59 2013 +0100
+++ b/progs/C4.c	Wed Oct 09 15:51:03 2013 +0100
@@ -1,10 +1,8 @@
 #include<stdio.h>
 #include<string.h>
 
-// a program that just prints the argument
+// a program that "just" prints the argument
 // on the command line
-//
-// try and run it with %s
 
 
 main(int argc, char **argv)