title: Double backslash in cmd directory handling
body: <p>Due to sometimes empty variables within a cmd-script I get directory definitions with doubled backslashes (\\). Example:</p>
  
  <pre><code>SET "Mp3OutDir=%Mp3Root%\%AlbumDir%\%AlbumArtist1stChar%\%AlbumArtistSort_VDN%\[%Year%] %Album_VDN%"
  </code></pre>
  
  <p>leads, if %AlbumDir% is not defined by user within the procedure, to something like</p>
  
  <pre><code>mkdir "D:\Public\Music\Mp3CDRips\\G\Gabriel, Peter"
  </code></pre>
  
  <p>This seems to work without errors but I'm curious if a term like this is permitted by the cmd-interpreter.</p>
  
  <p>Cheers, Martin</p>