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.

2011/goren/README.md

@@ -1,21 +1,21 @@
 ## To build:
 
 ```sh
-make
+    make
 ```
 
 
 ## To use:
 
 ```sh
-echo "some text" | ./goren
+    echo "some text" | ./goren
 ```
 
 
 ## Try:
 
 ```sh
-./try.sh
+    ./try.sh
 ```
 
 
@@ -28,13 +28,13 @@ In the words of [René François Ghislain Magritte Magritte](http://en.wikipedia
 One may ask the surrealist question:
 
 ```sh
-echo 'If | is just a representation of a pipe, then how can data stuff it?' | ./goren
+    echo 'If | is just a representation of a pipe, then how can data stuff it?' | ./goren
 ```
 
 However if one takes a firm stand and declares:
 
 ```sh
-echo '| is just a representation of a pipe because I say so! So stuff it!' | ./goren
+    echo '| is just a representation of a pipe because I say so! So stuff it!' | ./goren
 ```
 
 something happens!  Why?
@@ -56,8 +56,8 @@ a pipe.  But what IS a pipe? This program tries to provide an answer.
 Magritte's [test for pipes](http://en.wikipedia.org/wiki/The_Treachery_of_Images) is:
 
 ```
-The famous pipe. How people reproached me for it! And yet, could
-you stuff my pipe? No, it's just a representation, is it not?
+    The famous pipe. How people reproached me for it! And yet, could
+    you stuff my pipe? No, it's just a representation, is it not?
 ```
 
 Accordingly, this program only approves pipes which can be used for