title: Auto-convert tab to 4 spaces in TextWrangler?
body: <p>Is there a preference in Textwrangler to redefine a tab as 4 spaces? In Vim this is <code>set expandtab</code> in the vimrc, but I don't know how to set it in TW besides clicking "Detab" when I'm done editing the document.</p>
  
  <p>Thanks,
  Kevin</p>