Nit.

kohler · kohler · commit 75f7d0025a84 · 2016-09-30T19:02:05.000-04:00
diff --git a/fundamentals1/addin.c b/fundamentals1/addin.c
@@ -30,7 +30,7 @@ void die(const char* file) {
 
 int main(int argc, char* argv[]) {
     if (argc <= 4) {
-        fprintf(stderr, "Usage: mysum-file FILE OFFSET A B\n\
+        fprintf(stderr, "Usage: addin FILE OFFSET A B\n\
     Prints A + B.\n");
         exit(1);
     }

Original file line number	Diff line number	Diff line change
`@@ -30,7 +30,7 @@ void die(const char* file) {`
`30`	`30`
`31`	`31`	`int main(int argc, char* argv[]) {`
`32`	`32`	`if (argc <= 4) {`
`33`		`- fprintf(stderr, "Usage: mysum-file FILE OFFSET A B\n\`
	`33`	`+ fprintf(stderr, "Usage: addin FILE OFFSET A B\n\`
`34`	`34`	`Prints A + B.\n");`
`35`	`35`	`exit(1);`
`36`	`36`	`}`