From: anton.txt@gmail.com   
      
   Herbert Kleebauer:   
      
   > echo a>a.txt   
   > echo b>b.txt   
   > echo c>c.txt   
   > set list=   
   > for  %%i in (*.txt) do call set list=%%list%%,%%i   
   > echo %list%   
      
   Thank you.  What does the double percent in %%list%%   
   do?  I didn't find an explanation in  the  help  for   
   either SET or FOR.   
      
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