Update runtime files
diff --git a/runtime/indent/livebook.vim b/runtime/indent/livebook.vim
new file mode 100644
index 0000000..6311050
--- /dev/null
+++ b/runtime/indent/livebook.vim
@@ -0,0 +1,9 @@
+" Placeholder livebook indent file.
+" This simply uses the markdown indenting.
+
+" Only load this indent file when no other was loaded.
+if exists("b:did_indent")
+  finish
+endif
+
+runtime! indent/markdown.vim