fix Makefile and README.md for 2019/diels-grabsch1

2019/diels-grabsch1/README.md

@@ -1,28 +1,34 @@
 # Best small program
 
-Volker Diels-Grabsch  
-<https://njh.eu>  
+    Volker Diels-Grabsch  
+    <https://njh.eu>  
 
+# To build:
 
-## Judges' comments:
-### To use:
+```sh
+make
+```
 
-    make
+### To run:
 
-    ./prog < file > file.Z
+```sh
+./prog < file > file.Z
+```
 
 ### Try:
 
-    dd bs=1024 count=2048 < /dev/zero | compress > ref.Z
-    dd bs=1024 count=2048 < /dev/zero | ./prog > dg1.Z
-    cmp ref.Z dg1.Z
+```sh
+dd bs=1024 count=2048 < /dev/zero | compress > ref.Z
+dd bs=1024 count=2048 < /dev/zero | ./prog > dg1.Z
+cmp ref.Z dg1.Z
 
-    compress < ../mills/Shakespeare.txt > ref.Z
-    ./prog < ../mills/Shakespeare.txt > dg1.Z
-    cmp ref.Z dg1.Z # Oops, the files differ
-    zcat < dg1.Z | cmp - ../mills/Shakespeare.txt # Decompresses correctly. What is going on?
+compress < ../mills/Shakespeare.txt > ref.Z
+./prog < ../mills/Shakespeare.txt > dg1.Z
+cmp ref.Z dg1.Z # Oops, the files differ
+zcat < dg1.Z | cmp - ../mills/Shakespeare.txt # Decompresses correctly. What is going on?
+```
 
-### Selected Judges Remarks:
+## Judges' comments:
 
 Finally, IOCCC now has its own text compression program, and it is short
 enough to qualify for the Best Short Program award! That said, can you
@@ -33,16 +39,21 @@ Can you explain why the zero file compresses identically by the entry and the
 standard compress tool, but the text file compresses differently? The judges know. :)
 
 ## Author's comments:
+
 ### A tiny "compress" tool
 
 `Usage:`
 
-    ./prog < guidelines.txt > guidelines.txt.Z
+```sh
+./prog < guidelines.txt > guidelines.txt.Z
+```
 
 `Check for correctness:`
 
-    zcat guidelines.txt.Z > guidelines2.txt
-    diff -s guidelines.txt guidelines2.txt
+```sh
+zcat guidelines.txt.Z > guidelines2.txt
+diff -s guidelines.txt guidelines2.txt
+```
 
 `Of course you can`  
 `also use 2015/mills2 instead of zcat to verify the output`  
@@ -54,11 +65,10 @@ standard compress tool, but the text file compresses differently? The judges kno
 `32-bit and 64-bit platforms. It compiles without warnings`  
 `on both GCC and Clang even with -Wextra and -Weverything.`
 
---------------------------------------------------------------------------------
-<!--
+## Copyright:
+
 (c) Copyright 1984-2019, [Leo Broukhis, Simon Cooper, Landon Curt Noll][judges] - All rights reserved
 This work is licensed under a [Creative Commons Attribution-ShareAlike 3.0 Unported License][cc].
 
 [judges]: http://www.ioccc.org/judges.html
 [cc]: http://creativecommons.org/licenses/by-sa/3.0/
--->