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

1995/leo/README.md

@@ -5,12 +5,14 @@ Leonid A. Broukhis\
 Fremont, CA 94539\
 US
 
+
 ## To build:
 
 ```sh
 make all
 ```
 
+
 ## To use:
 
 ```sh
@@ -19,7 +21,8 @@ make all
 
 See the author's information below on these details.
 
-## Try:
+
+### Try:
 
 ```sh
 ./leo 1 | cat - /dev/tty | gs -
@@ -265,6 +268,7 @@ Special thanks:
 - to Dmitry Mendeleyev for his periodic table of elements;
 - to Hydrogen for having 2 more isotopes.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.