- (:documentation "Returns a list of the vertexes to which `vertex` is connected by an edge and for which `vertex` is the source vertex. If the connecting edge is undirected, then the vertex is always counted as a source. [?? Could be a defun]."))
+ (:documentation "Returns a list of the vertexes to which `vertex`
+is connected by an edge and for which `vertex` is the source vertex.
+If the connecting edge is undirected, then the vertex is always
+counted as a source. [?? Could be a defun]."))