Fix typo on intermediate dot file name.

scripts/gen_centered_graph.py

@@ -1,12 +1,10 @@
-import requests
-import sys
 import subprocess
 import ops_cache
 import copy
 import tempfile
+import os
 
 # TODO: Properly render outgouing links
-
 @ops_cache.cache
 def gen(headline_id, graph):
     reference_node = headline_id
@@ -117,9 +115,9 @@ def gen(headline_id, graph):
                 print("_" + k.replace("-", "_") + "->" + t, file=f)
 
         f.write('}\n')
-        f.close()
+        f.flush()
 
         with tempfile.NamedTemporaryFile(suffix='.svg') as fsvg:
-            subprocess.call("fdp graph.dot -Tsvg -o '{}'".format(fsvg.name), shell=True)
+            subprocess.call(['fdp', f.name, '-Tsvg', '-o', fsvg.name])
             fsvg.seek(0)
             return fsvg.read().decode()

scripts/generate.py

@@ -725,7 +725,7 @@ def render(headline, doc, graph, headlineLevel):
 
     content = []
     render_tree(dom, content, headline, graph)
-    if headline.id:
+    if headline.id and headlineLevel == 0:
         render_connections(headline.id, content, graph)
 
     for child in headline.children: