Fixed small template error

diegoreico · web-flow · commit 52df0908278f · 2017-05-18T15:44:29.000+02:00
diff --git a/tutorials/tour/_posts/2017-02-13-lower-type-bounds.md b/tutorials/tour/_posts/2017-02-13-lower-type-bounds.md
@@ -1,4 +1,4 @@
-  ---
+---
 layout: tutorial
 title: Lower Type Bounds
 
