Bug#1115309: elpa-magit: magit-branch fails with error message

[Nicholas D Steeves <sten@debian.org>]

Oops
>
>   $ mv ~/.emacs.d/eln-cache ~/.emacs.d/eln-cache
>

I forgot to choose a target

  $ mv ~/.emacs.d/eln-cache ~/.emacs.d/eln-cache_broken