mark the generated index as an orphan

conf.py

@@ -135,12 +135,11 @@ def get_open_mode():
 def generate_tag_indices():
     os.makedirs('docs/tags', mode=0o755, exist_ok=True)
     with open('docs/tags/index.rst', get_open_mode()) as topidx:
-        #topidx.write(':orphan:\n\n')
+        topidx.write(':orphan:\n\n')
         for tag_tuple in get_tags():
             tag = tag_tuple[0]
             with open(('docs/tags/{name}.rst').format(name=tag),
                       get_open_mode()) as tagidx:
-                #tagidx.write(':orphan:\n\n')
                 tagidx.write('TODO: add links to the tools that have this tag')
             topidx.write(('.. _tag/{name}:\n\n').format(name=tag))
             topidx.write(('{name}\n').format(name=tag))