force use of pandoc version >= 3.1.12.2

The `bin/pandoc-wrapper.sh` tool will verify that the ssytem
has a recent enough version of `pandoc(1)`.

We explain why we insist on `pandoc(1)`. version >= 3.1.12.2
in comments where the $PANDOC_MIN_VERSION is set.

Added `--wrap=preserve` as a default argument to `pandoc(1)`.
While this change will impact every HTML file generated,
we believe this will improve the ability of someone to look
at the generated HTML and correlate with the original markdown.

Changed `bin/pandoc-wrapper.sh` VERSION from "1.4.2 2024-03-17"
to "1.4.3 2024-03-18".

Performed `make www` to achieve all of the above and to generate
HTML using the new  `--wrap=preserve` `pandoc(1)` mode.

1992/buzzard.2/buzzard.2.README.html

@@ -121,25 +121,22 @@
 <!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
 
 <p><a href="buzzard.2.README.md">buzzard.2.README.md</a> this file<br />
-<a href="buzzard.2.design.md">buzzard.2.design.md</a> description of
-FIRST (design documentation of THIRD)<br />
+<a href="buzzard.2.design.md">buzzard.2.design.md</a> description of FIRST (design documentation of THIRD)<br />
 <a href="third">third</a> implementation of THIRD in FIRST<br />
 <a href="help.th">help.th</a> online listing of THIRD primitives<br />
 </p>
 <h1 id="first-demos">FIRST demos:</h1>
 <p>Use <code>./first &lt; &lt;demo&gt;</code>.</p>
-<p><a href="demo1.1st">demo1.1st</a> prints Hello World! assuming
-ASCII</p>
+<p><a href="demo1.1st">demo1.1st</a> prints Hello World! assuming ASCII</p>
 <h1 id="third-demos">THIRD demos:</h1>
 <p>Use <code>cat third &lt;demo&gt; | ./first</code>.</p>
 <h2 id="demo-files">Demo files:</h2>
-<p><a href="demo1.th">demo1.th</a> prints Hello World! regardless of
-character set <a href="demo2.th">demo2.th</a> demonstrates a simple loop
-<a href="demo3.th">demo3.th</a> demonstrates a simple if test <a
-href="demo4.th">demo4.th</a> recursive factorial calculating on the way
-up <a href="demo5.th">demo5.th</a> recursive factorial calculating on
-the way down <a href="demo6.th">demo6.th</a> demonstrates switching from
-compiler to execution mode</p>
+<p><a href="demo1.th">demo1.th</a> prints Hello World! regardless of character set
+<a href="demo2.th">demo2.th</a> demonstrates a simple loop
+<a href="demo3.th">demo3.th</a> demonstrates a simple if test
+<a href="demo4.th">demo4.th</a> recursive factorial calculating on the way up
+<a href="demo5.th">demo5.th</a> recursive factorial calculating on the way down
+<a href="demo6.th">demo6.th</a> demonstrates switching from compiler to execution mode</p>
 <h1 id="interactive-third">Interactive THIRD:</h1>
 <p>Use <code>cat third - | ./first</code>.</p>
 <p>To include the primitive on-line help, use