title: Vim 8.0: Can't disable autoindent on Ubuntu 18.04 LTS
body: <p>I'm using Ubuntu 18.04 LTS and install vim by <code>sudo apt get install vim</code>. Package version is 8.x. 
  Event I <code>set noautoindent</code> and <code>set nosmartindent</code> but the indentation still happens automatically.
  It looks more like a "smart" one because if I type "end" after typing <code>enter</code> in a *.rb file, the indentation is automatically removed.</p>