kmx.io/update_header

diff --git a/.gitignore b/.gitignore
index 1130283..5fce752 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,5 @@ update_header-*.tar
 
 # Temporary files, for example, from tests.
 /tmp/
+
+/update_header
diff --git a/lib/update_header.ex b/lib/update_header.ex
index c78848b..01c70b4 100644
--- a/lib/update_header.ex
+++ b/lib/update_header.ex
@@ -4,7 +4,7 @@
 defmodule UpdateHeader do
 
   def main(argv) do
-    IO.puts("update_header #{argv}")
+    IO.puts("update_header #{inspect argv}")
     update(argv)
   end