Fix links originating from top-level of graph center.

scripts/gen_centered_graph.py

@@ -9,15 +9,20 @@ import os
 def gen(headline_id, graph):
     reference_node = headline_id
 
+    linked_from_internal = set()
     g = copy.deepcopy(graph)
     centered_graph = { reference_node: g[reference_node] }
+    for l in g[reference_node]['links']:
+        lt = l['target']
+        if lt.startswith("id:"):
+            lt = lt[3:]
+        linked_from_internal.add(lt)
     del g[reference_node]
     new_nodes = True
 
     in_emacs_tree = {
         reference_node: set(),
     }
-    linked_from_internal = set()
 
     while new_nodes:
         new_nodes = False