title: Vim: underscore(_) automatically converted to (<-)
body: <p>I have been writing R scripts in Vim for some time now. Starting an hour ago, I began facing an issue that every time I type an underscore (<code>_</code>), it gets automatically converted to <code>&lt;-</code>. </p>
  
  <p>What setting did I change for this to happen? Thanks!</p>