title: making the subversion revision number visible in my R scripts
body: <p>I'm putting this thing in my source(s)...  (right, for now it's just one, plus the test scripts).</p>
  
  <pre><code>REVISION = (function(x) substring(x, first=7, last=nchar(x)-2))("$Rev: 8727 $")
  </code></pre>
  
  <p>but how do "real" R programmers do?  </p>