--- a/mercurial/hgweb/hgweb_mod.py	Sat Mar 10 16:17:51 2018 -0800
+++ b/mercurial/hgweb/hgweb_mod.py	Sat Mar 10 20:16:20 2018 -0800
@@ -408,10 +408,11 @@
 
                 if content is res:
                     return res.sendresponse()
-
-                wsgireq.respond(HTTP_OK, ctype)
-
-            return content
+                elif content is True:
+                    return []
+                else:
+                    wsgireq.respond(HTTP_OK, ctype)
+                    return content
 
         except (error.LookupError, error.RepoLookupError) as err:
             wsgireq.respond(HTTP_NOT_FOUND, ctype)