update reference

steveklabnik · steveklabnik · commit c83566e7b81f · 2018-01-30T09:14:53.000-05:00
diff --git a/src/doc/reference b/src/doc/reference
@@ -1 +1 @@
-Subproject commit 1d791b55b23ec5389fbd5b3cee80db3f8bbdd162
+Subproject commit e6a5d5d10aa2fde0baed7b29bf672bd9f3af8962
