BUG: 'error: invalid key: pager.show_ref' on 'git show_ref'

Hi all,

there seems to be a regression in the behaviour of 'git show_ref' (note the underscore). In v2.0.3-711-g586f414 it starts to say:

  $ ./git show_ref
  error: invalid key: pager.show_ref
  git: 'show_ref' is not a git command. See 'git --help'.

and somewhere (probably two commits, judging the diffs) later that changes again to:

  $ git show_ref
  error: invalid key: pager.show_ref
  error: invalid key: alias.show_ref
  git: 'show_ref' is not a git command. See 'git --help'.

Apparently we need to squelch this message from within git_config_get_* in this case?

Still present in 2.3.0.

Andreas