weavejester/compojure — pull request #73 by cemerick (2012-12-14 14:57:52+00:00)
Title: Ensure that `render` retains the metadata on any provided response map

Upstream adapters or middleware (in my particular case, Friend) may provide functionality based on metadata found on response maps. The map implementation of `render` currently merges response maps into an "empty" map, thus losing any metadata on the former.