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

2012/endoh2/README.md

@@ -5,12 +5,14 @@ Yusuke Endoh\
 <https://github.com/mame/>\
 Mastodon: [@mame@ruby.social](https://ruby.social/@mame)
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To use:
 
 ```sh
@@ -29,12 +31,14 @@ gcc -o e e.c
 
 ...
 
-## Try:
+
+### Try:
 
 ```sh
 ./everything.sh
 ```
 
+
 ## Judges' remarks:
 
 A
@@ -44,6 +48,7 @@ art](https://en.wikipedia.org/wiki/ASCII_art) with a compressed font in it; what
 else to wish for in this program? [Virtual
 machine](https://en.wikipedia.org/wiki/Virtual_machine) emulation?
 
+
 ## Author's remarks:
 
 Yeah, "Again".  Sorry.  But I don't feel guilty or uncomfortable.
@@ -150,6 +155,7 @@ You can do `make everything` for the process (with no `cat`).
 Note: The executable may return a failure (non-zero) exit status
 unless `-std=c99` option is given.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.