title: Prevent (g)vim from auto-indenting comments
body: <p>A while ago, I had to put</p>
  
  <pre><code>filetype plugin on
  </code></pre>
  
  <p>in my .vimrc for a plugin I use.</p>
  
  <p>But this caused a change in autoindent: Whenever I write a comment "//", and then press enter, vim autoindentation automatically enters another "//" in the next line.</p>
  
  <pre><code>// This is a comment. &lt;ENTER&gt;
  // &lt;-- vim automatically puts '// ' there
  </code></pre>
  
  <p>What can I do to avoid this?
  I use the autoindent setting in my vim file.
  I already tried</p>
  
  <pre><code>filetype plugin indent off
  </code></pre>
  
  <p>but it does not work.</p>