Add missing doc format tag

nicolasstucki · nicolasstucki · commit 2c472088d7d5 · 2017-12-23T08:22:45.000+01:00
diff --git a/docs/docs/reference/symmetric-meta-programming.md b/docs/docs/reference/symmetric-meta-programming.md
@@ -1,3 +1,8 @@
+---
+layout: doc-page
+title: "Symmetric Meta Programming"
+---
+
 # Symmetric Meta Programming
 
 Symmetric meta programming is a new framework for staging and for some
