Update README.md

Author: jbodah

README.md

@@ -55,6 +55,7 @@ We've decided not to include `mix format` integration into `vim-elixir`. If you'
 ## Development
 
 Run the tests: `bundle exec parallel_rspec spec`
+
 Spawn a container with vim and dev configs: `docker-compose build && docker-compose run vim`
 
 [vim-dadbod]: https://github.com/tpope/vim-dadbod