improved indentation and whitespace for markdown code blocks

All code blocks in markdown have been intended by at least 4 spaces.

We add `--tab-stop=8` to all `pandoc(1)` executions in order to set
a better tab stop indentation, especially for tab intended code blocks.

Changed `bin/pandoc-wrapper.sh` VERSION from "1.5.3 2024-03-26"
to "1.6 2024-03-31".

Fixed `1991/brnstnd/sorta.README.md` so that the sorta code
is code blocks.

Removed unneeded paragraph group in copyright in `inc/footer.default.html`.

Fixed excess whitespace after list Author on entry `index.html` page.

Changed `bin/output-index-author.sh` VERSION from "1.5.2 2024-03-26"
to "1.6 2024-03-31".

Performed `make www` to perform the above and test under macOS.

TODO: Fix the problem of the initial line of code being extra intended.
TODO: Fix excess whitespace around code that is inline.

1996/jonth/README.md

@@ -1,7 +1,7 @@
 ## To build:
 
 ```sh
-make all
+    make all
 ```
 
 NOTE: this entry requires `X11/Xlib.h` header file and the X11 library to
@@ -15,8 +15,8 @@ entry.
 The current status of this entry is:
 
 ```
-STATUS: INABIAF - please **DO NOT** fix
-STATUS: missing or dead link - please provide them
+    STATUS: INABIAF - please **DO NOT** fix
+    STATUS: missing or dead link - please provide them
 ```
 
 For more detailed information see [1996 jonth bugs](../../bugs.html#1996_jonth).
@@ -25,7 +25,7 @@ For more detailed information see [1996 jonth bugs](../../bugs.html#1996_jonth).
 ## To use:
 
 ```sh
-./jonth :0 :0
+    ./jonth :0 :0
 ```
 
 NOTE: the two boards will be on top of each other so you will have to drag one
@@ -36,21 +36,21 @@ NOTE: if there is no X service open this will crash. If this is the case you
 might try:
 
 ```sh
-./jonth
+    ./jonth
 ```
 
 These are supposed to happen.  As is written in the
 [The Jargon File](http://catb.org/jargon/html/F/feature.html):
 
 ```
-That's not a bug, that's a feature.
+    That's not a bug, that's a feature.
 ```
 
 
 ## Try:
 
 ```sh
-./jonth host1:0 host2:0
+    ./jonth host1:0 host2:0
 ```