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.

1998/tomtorfs/README.md

@@ -1,32 +1,32 @@
 ## To build:
 
 ```sh
-make all
+    make all
 ```
 
 
 ## To use:
 
 ```sh
-./tomtorfs filename bitwidth polynom reflected init xor
+    ./tomtorfs filename bitwidth polynom reflected init xor
 ```
 
 where:
 
 ```
-filename  : file to calculate the CRC of
-bitwidth  : width of the CRC in bits (decimal)
-polynom   : polynomial used for the CRC (hexadecimal)
-reflected : 0 if the CRC is not reflected, 1 if it is
-init      : initial value for the CRC (hexadecimal)
-xor       : value to xor the final CRC with (hexadecimal)
+    filename  : file to calculate the CRC of
+    bitwidth  : width of the CRC in bits (decimal)
+    polynom   : polynomial used for the CRC (hexadecimal)
+    reflected : 0 if the CRC is not reflected, 1 if it is
+    init      : initial value for the CRC (hexadecimal)
+    xor       : value to xor the final CRC with (hexadecimal)
 ```
 
 
 ## Try:
 
 ```sh
-./try.sh
+    ./try.sh
 ```
 
 
@@ -40,15 +40,15 @@ archiver that uses the CRC-32 algorithm.
 ## Author's remarks:
 
 ```
-Usage:
-./tomtorfs filename bitwidth polynom reflected init xor
+    Usage:
+    ./tomtorfs filename bitwidth polynom reflected init xor
 
-filename  : file to calculate the CRC of
-bitwidth  : width of the CRC in bits (decimal)
-polynom   : polynomial used for the CRC (hexadecimal)
-reflected : 0 if the CRC is not reflected, 1 if it is
-init      : initial value for the CRC (hexadecimal)
-xor       : value to xor the final CRC with (hexadecimal)
+    filename  : file to calculate the CRC of
+    bitwidth  : width of the CRC in bits (decimal)
+    polynom   : polynomial used for the CRC (hexadecimal)
+    reflected : 0 if the CRC is not reflected, 1 if it is
+    init      : initial value for the CRC (hexadecimal)
+    xor       : value to xor the final CRC with (hexadecimal)
 ```
 
 ### Examples
@@ -57,7 +57,7 @@ xor       : value to xor the final CRC with (hexadecimal)
 #### CRC-16:
 
 ```sh
-./tomtorfs filename 16 1021 0 FFFF 0000
+    ./tomtorfs filename 16 1021 0 FFFF 0000
 ```
 
 
@@ -65,22 +65,21 @@ xor       : value to xor the final CRC with (hexadecimal)
 
 
 ```sh
-./tomtorfs filename 32 04C11DB7 1 FFFFFFFF FFFFFFFF
+    ./tomtorfs filename 32 04C11DB7 1 FFFFFFFF FFFFFFFF
 ```
 
 
 #### XMODEM:
 
 ```sh
-./tomtorfs filename 16 8408 1 0000 0000
-
+    ./tomtorfs filename 16 8408 1 0000 0000
 ```
 
 
 #### ARC:
 
 ```sh
-./tomtorfs filename 16 8005 1 0000 0000
+    ./tomtorfs filename 16 8005 1 0000 0000
 ```
 
 
@@ -110,22 +109,22 @@ The variable names are not very descriptive. They have the
 following meanings:
 
 ```
-a = argc
-A = argv
+    a = argc
+    A = argv
 
-b = array of unsigned long variables
-    b[0] = bit-width of the CRC (argv[2])
-    b[1] = CRC polynomial (argv[3])
-    b[2] = nonzero if CRC is reflected (argv[4])
-    b[3] = initial value of CRC (argv[5])
-    b[4] = value final CRC is XORed with (argv[6])
-    b[5] = CRC value
-    b[6] = byte from file
-    b[7] = counter
+    b = array of unsigned long variables
+	b[0] = bit-width of the CRC (argv[2])
+	b[1] = CRC polynomial (argv[3])
+	b[2] = nonzero if CRC is reflected (argv[4])
+	b[3] = initial value of CRC (argv[5])
+	b[4] = value final CRC is XORed with (argv[6])
+	b[5] = CRC value
+	b[6] = byte from file
+	b[7] = counter
 
-B = FILE * through which the file argv[1] is opened
+    B = FILE * through which the file argv[1] is opened
 
-C = typedef for unsigned long
+    C = typedef for unsigned long
 ```
 
 The first `for` loop simply reads the command-line arguments