diff --git a/manual.scrbl b/manual.scrbl
index 5c09632..7411d0e 100644
--- a/manual.scrbl
+++ b/manual.scrbl
@@ -74,6 +74,7 @@ The opaque type corresponding to the predicate @racketlink[g:matrix-graph? "matr
 }
 
 @subsection{Generic Graph Interface}
+
 @defproc[(has-vertex? [g Graph] [v Any]) Boolean]{}
 @defproc[(has-edge? [g Graph] [u Any] [v Any]) Boolean]{}
 @defproc[(vertex=? [g Graph] [u Any] [v Any]) Boolean]{}