title: Rails.root filepath wildcards
body: <p>Here's my code in a rake task to open a file: </p>
  
  <pre><code>  File.open(Rails.root.join("public/system/xmls/**/original/*.csv"),"r") do |file| 
    #etc
  </code></pre>
  
  <p>but it's not matching any file (there are three possible matches). The first ** is a folder with a 2 digit name. Where am I going wrong? </p>