use a different example for setting a graph attribute

diff --git a/lib/graph/graph.3 b/lib/graph/graph.3
index 49fbc7bf04cef32d78b389f624acee6825067ebd..e60836f7c9c6aae6a18ac1f5fd7da2828331eb82 100644 (file)
--- a/lib/graph/graph.3
+++ b/lib/graph/graph.3
@@ -252,7 +252,7 @@ graph any_name {            /* an undirected graph */
 }
 
 digraph G {
-    bb="8.5,11";            /* sets a graph attribute */
+    size="8.5,11";            /* sets a graph attribute */
     a -> b;                 /* makes a directed edge */
     chip12.pin1 -> chip28.pin3; /* uses named node "ports" */
 }