 
     With drawn files '(\"path/to/image1.png\" \"path/to/image2.png\")
 
-   \"convert '<<f>>' '<<fne>>.jpg'\" yields
+   \"convert '<<f>>' '<<fne>>.jpg'\" expands to
 
      \"convert 'path/to/image1.png' 'path/to/image1.jpg'\"
      \"convert 'path/to/image2.png' 'path/to/image2.jpg'\"
 
-   while \"ls -lh <<*>>\" yields
+   while \"ls -lh <<*>>\" expands to
 
      \"ls -lh path/to/image1.png path/to/image2.png\"
 


    Given FILES '(\"path/to/image1.png\" \"path/to/image2.png\")

    \"du -csh <<*>>\"

    yields

    \"du -csh 'path/to/image1.png' 'path/to/image2.png'\"

Use POST-PROCESS-TEMPLATE to further expand template given own logic.



    Given :FILES '(\"path/to/image1.png\" \"path/to/image2.png\")

    \"convert '<<f>>' '<<fne>>.jpg'\" expands to

      \"convert 'path/to/image1.png' 'path/to/image1.jpg'\"
      \"convert 'path/to/image2.png' 'path/to/image2.jpg'\"

    and \"ls -lh <<*>>\" expands to

      \"ls -lh path/to/image1.png path/to/image2.png\"

:EXTENSIONS ensures that all files in :FILES have the given
extensions.  Can be either single string \"png\" or a list '(\"png\" \"jpg\").
