--- cello.c.orig	2016-06-13 16:39:56.482961014 -0500
+++ cello.c	2016-06-13 16:39:13.141290265 -0500
@@ -1,6 +1,6 @@
 #include<stdio.h>
 
 int main(void){
-    printf("Hello World!\n");
+    printf("Hello World from my very first patch!\n");
     return 0;
 }