fix standard headers and header spacing in winner README.md files

2015/schweikhardt/README.md

@@ -3,12 +3,14 @@
     Jens Schweikhardt\
     <http://www.schweikhardt.net>
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To use:
 
 ```sh
@@ -17,12 +19,14 @@ make
 
 where n is a base 16 number of any size.
 
-## Try:
+
+### Try:
 
 ```sh
 ./prog 19
 ```
 
+
 ## Judges' remarks:
 
 This code is clean.  When you compile with all warnings enabled,
@@ -77,6 +81,7 @@ build some very complex structures.  :-)
 p.s. We appreciated that apart from a few powers of 2, the source
 code is magic number free.
 
+
 ## Author's remarks:
 
 ### The TL;DR version
@@ -781,6 +786,7 @@ memory resources with the ulimit(1) built-in of your shell.
 
 For all intents and purposes, the *Not Overflowing Type* keeps the promise!
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.