bling/vim-airline — pull request #577 by qstrahl (2014-08-16 03:02:21+00:00)
Title: Don't wipe out b:airline_head if fugitive finds the head

- Fugitive can edit virtual files that represent objects in git; while
editing these files, it still reports on the HEAD of the relevant
repo, which should be displayed as the branch (rather than having the
branch section disappear)