title: Suppress output from a vim autocmd?
body: <p>I have a simple <code>BufWritePost</code> autocmd to automatically generate HTML from my vimwiki pages.</p>
  
  <pre><code>autocmd BufWritePost *.wiki VimwikiAll2HTML
  </code></pre>
  
  <p>But it spits out a lot of progress output, and a prompt at the end:</p>
  
  <pre><code>Press ENTER or type command to continue
  </code></pre>
  
  <p>Is there a way to suppress the output and prompt from a vim autocmd, to make it completely transparent?</p>