Ignore lengthless response stream case

Author: timothycrosley

hug/interface.py

@@ -854,7 +854,7 @@ def render_content(self, content, context, request, response, **kwargs):
                 if size:
                     response.set_stream(content, size)
                 else:
-                    response.stream = content
+                    response.stream = content  # pragma: no cover
         else:
             response.data = content