title: Vim replacing tabs with double spaces
body: <p>So I've written some code of an assignment and i forgot the universities policy of
  indent with 2spaces.</p>
  
  <p>Normally I'ld have put a:
  <code>//vim: ts=2:tw=78: et:</code></p>
  
  <p>at the top of my files, but this time I forgot.</p>
  
  <p>How should I go about replacing all tabs with 2 space?
  would 
  s/[TAB]/[SPACE][SPACE]
  work?
   (replacing [TAB] and [SPACE] with the respective key presses for the characters)</p>