title: vim search command not working. :N
body: <p>I think a plugin broke my default search behavior.</p>
  
  <p>:n works, which is searching forwards, but :N does not, which is searching backwards. 
  How can I find out why the :N key-binding does not work? 
  So how can I find out where the :N behaviour gets redefined? answer: -> use :map.</p>