Update.

Change-Id: Ic210fca0cfbe6f30676017e1d573d904d583ae90
diff --git a/.gitignore b/.gitignore
index b25c15b..ebdbf97 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 *~
+/rust-tutorial.html
+
+/target
+**/*.rs.bk