title: To batch reduce a space in the file names
body: <p>After batch rename so many files using a batch file, I found that the naming structure looks like below:</p>
  
  <p>FILENAME__###.jpg</p>
  
  <p>There are two spaces (the two underscores above) between the FILENAME and the numbering ###. How can I remove one space (or reduce that 2 spaces to 1 space) for all of the files (may with different suffixes) under a directory with the above naming structure using a batch command file in the command prompt of Windows system.</p>
  
  <p>Thank you very much.</p>