Fixed Makefile format target to point to the right files.
diff --git a/Makefile b/Makefile
index 58589c1..51e1429 100644
--- a/Makefile
+++ b/Makefile
@@ -12,5 +12,5 @@
 
 format:
 	${GOFMT} -w gocheck.go
-	${GOFMT} -w gocheckrun.go
-	${GOFMT} -w gochecktest.go
+	${GOFMT} -w helpers.go
+	${GOFMT} -w run.go