title: Vim autocmd error
body: <p>I have this script to set variables when loading Python files</p>
  
  <pre><code>au BufNewFile,BufRead *.py
      \ set tabstop=4
      \ set softtabstop=4
      \ set shiftwidth=4
      \ set textwidth=79
      \ set expandtab
      \ set autoindent
      \ set fileformat=unix
  </code></pre>
  
  <p>When I load a Python file I get this error:</p>
  
  <pre><code>Error detected while processing BufRead Auto commands for "*.py":
  E518: Unknown option: set
  </code></pre>