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.

1995/dodsond1/README.md

@@ -1,21 +1,21 @@
 ## To build:
 
 ```sh
-make all
+    make all
 ```
 
 
 ## To use:
 
 ```sh
-./dodsond1 < text_file
+    ./dodsond1 < text_file
 ```
 
 
 ## Try:
 
 ```sh
-./dodsond1 < README.md
+    ./dodsond1 < README.md
 ```
 
 
@@ -24,16 +24,16 @@ make all
 You might consider giving the following input:
 
 ```
-... a male (who) gets very, very frustrated sitting in a chair all
-the time because males are biologically driven to go out and hunt
-giraffes.
-	-- Adjunct Professor Newt Gingrich, Reinhardt College, 1/7/95
+    ... a male (who) gets very, very frustrated sitting in a chair all
+    the time because males are biologically driven to go out and hunt
+    giraffes.
+	    -- Adjunct Professor Newt Gingrich, Reinhardt College, 1/7/95
 ```
 
 ... which can be done like:
 
 ```c
-./try.sh
+    ./try.sh
 ```