hyperium/hyper — pull request #158 by dpc (2014-11-28 11:54:03+00:00)
Title: Fix `HeaderFormatter`.

Issue #157

This seems to be working for me. I made the field public, and as I don't see the reason to ever clone the header, I make HeaderFormatter just borrow the header. It should be have a short lifetime, just using the Header itself for a moment.