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

1998/df/README.md

@@ -6,12 +6,14 @@ Salenbergstrasse 11		(home address)\
 D 72250 Freudenstadt\
 German Federal Republic
 
+
 ## To build:
 
 ```sh
 make all
 ```
 
+
 ## To use:
 
 ```sh
@@ -41,6 +43,7 @@ Extra credit questions:
 - How many words does this entry use?
 - Can you add more words to the program and still make it work?
 
+
 ## Author's remarks:
 
 This program lets you guess English words. It displays an underscore
@@ -150,6 +153,7 @@ this function.  Similarly, most indexing operations have been
 changed to this form; and I tried to write each such operation
 different.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.