update reference

steveklabnik · steveklabnik · commit b320829da41d · 2018-02-04T15:44:48.000-05:00
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 1d791b55b23ec5389fbd5b3cee80db3f8bbdd162
+Subproject commit e6a5d5d10aa2fde0baed7b29bf672bd9f3af8962
