fix dot files' edge generation

Before this patch, edges were defined using the following scheme :

  Node1 -> Node2 edge [attrs...]
  Node2 -> Node3

which `dot` understands as three instructions :

  Node1 -> Node2 ;
  edge [attr...];
  Node2 -> Node3;

which means that edge properties are applied to the Node2->Node3
edge rather than to the Node1->Node2 edge.

The correct syntax is :

  Node1 -> Node2 [attr...];
  Node2 -> Node3;

1 files changed, 1 insertions, 1 deletions

diff --git a/graph.py b/graph.py
index a672166..c6469ef 100644
--- a/graph.py
+++ b/graph.py
@@ -105,7 +105,7 @@ class DotBackend:
         """
         attrs = ['%s="%s"' % (prop, value) for prop, value in props.items()]
         n_from, n_to = normalize_node_id(name1), normalize_node_id(name2)
-        self.emit('%s -> %s edge [%s];' % (n_from, n_to, ", ".join(attrs)) )
+        self.emit('%s -> %s [%s];' % (n_from, n_to, ", ".join(attrs)) )
 
     def emit_node(self, name, **props):
         """Authorized props: see http://www.graphviz.org/doc/info/attrs.html