Skip test.
  
    $ exit 80

  Test helper and mock functions.

    $ git () {
    >     echo git "$@"
    > }

    $ b () {
    >     bundle "$@"
    >     bundle-list | tail -1
    > }

  
  Short and sweet.

    $ b lol

    plugin-name https://github.com/robbyrussell/oh-my-zsh.git plugins/plugin-name
  
  Short repo url.
  
    $ b github-username/repo-name

    repo-name https://github.com/github-username/repo-name.git /
  
  Short repo url with `.git` suffix.
  
    $ b github-username/repo-name.git

    repo-name https://github.com/github-username/repo-name.git /
  
  Long repo url.
  
    $ b https://github.com/user/repo.git

    repo https://github.com/user/repo.git /
  
  Long repo url with missing `.git` suffix (should'nt add the suffix).
  
    $ b https://github.com/user/repo

    repo https://github.com/user/repo /
  
  Short repo with location.
  
    $ b user/plugin path/to/plugin

    plugin https://github.com/user/plugin.git path/to/plugin

  Keyword arguments, in respective places.

    $ b --url=user/repo --loc=path/of/plugin

    plugin-name https://github.com/user/repo.git path/of/plugin
  
  Keyword arguments, in respective places, with full repo url.

    $ b --url=https://github.com/user/repo.git --loc=plugin/path

    name https://github.com/user/repo.git plugin/path
  
  Keyword arguments, in reversed order.

    $ b --loc=path/of/plugin --url=user/repo

    plugin-name https://github.com/user/repo.git path/of/plugin
  
  Mixed positional and keyword arguments, and skip `loc`.

    $ b user/repo --loc=plugin/loc
    plugin https://github.com/user/repo.git plugin/loc

  
  Just `loc`, using keyword arguments.
  
    $ b --loc=plugin/path
    path https://github.com/robbyrussell/oh-my-zsh.git plugin/path

  TODO: Error reporting with erroneous arguments or usage with incorrect syntax.