title: Insert character without entering insert mode?
body: <p>Sometimes I want to insert a  <code>#</code> to comment out a line and test it quickly. Currently I do:</p>
  
  <p><kbd>i</kbd><kbd>#</kbd><kbd>ESC</kbd><kbd>:</kbd><kbd>w</kbd></p>
  
  <p>Is there something shorter I can do?</p>