It tells recent versions of vim-ruby where your Ruby
installs are located, so that it can set 'path'
and ['tags'
][rbenv-ctags]
in your Ruby buffers to reflect the nearest .tool-version
or .ruby-version
or file.
If you don't have a preferred installation method, I recommend installing pathogen.vim, and then simply copy and paste:
cd ~/.vim/bundle
git clone git://github.com/jiz4oh/asdf.vim.git
Distributed under the same terms as Vim itself.
See :help license
.