anchor.diff:      url: ""
   ```
   
  -When you adopt the constraint of env vars you realize that this multiline yaml configuration can be accomplished with a single uri string. So instead of initializing your database with three or four lines you just pass in one:
  +When you adopt the constraint of env vars you realize that this multiline yaml configuration could be done with a single uri string. Instead of initializing your database with three or four lines you just pass in one:
   
   ```ruby
   client = MongoClient.from_uri(ENV['MONGO_URI'])
  
positive.code: 
  <% end %>
  
  After some prompts you will have a new key; add it to ssh-agent:
  
  ```sh
  # start the ssh-agent
  
negative.code: 
  ### Installing Ruby
  
  Install [rbenv](https://github.com/sstephenson/rbenv) by cloning it:
  
  ```sh
  $ cd
  