title: vim regex find and replace
body: <p>I want to use a regex to replace some strings in my file. I search for:
  <code>%s/^  [a-z]*/    /</code>
  what I want to do is to replace every [a-z]* that have 2 whitespaces with the sane [a-z] prepended with 4 whitespaces. Is there any "inplace" replacement or how would I reach that with vim?</p>
  
  <p>With best regards</p>