240109

   buser:

      I modified this script.

240504

   GUIDE:

      I corrected a typo in the "SAM limits" section.

240801

   GUIDE:

      I corrected some typos and renumbered all the sections.

      I also made some minor edits to improve readability, and I
      revised "About the changlog.txt files".

240804

   GUIDE:

      I revised the description of $sam_root/bits.  I fixed a typo or
      two.  I made minor clarifying changes to the section about
      "lockfile and msdos file systems".

240806

   buser:

      I revised this script.

240807

   TIPS:

      I made minor corrections for readability.

      I added descriptions of the new variables in begin.  These
      variables are sam_scroll, sam_font, and sam_geometry.

240808

   begin:

      I modified this script.

240812

   begin:

      I modified this script.

240820

   begin:

      I restored begin from pass24.

      I modified this script.

   GUIDE:

      I revised the content and title of section 26, "About code
      comments, junk directories, and changlog.txt files."

      I revised the "Special variables" section.

250110

   zbegin:

      I removed this script.

   GUIDE:

         25.2 Use of "bye" and "pop"      I fixed a typo in section:
