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

2015/endoh2/README.md

@@ -4,19 +4,22 @@ Yusuke Endoh\
 <https://github.com/mame/>\
 Mastodon: [@mame@ruby.social](https://ruby.social/@mame)
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To use:
 
 ```sh
 ./prog
 ```
 
-## Try:
+
+### Try:
 
 ```sh
 cat prog.c
@@ -24,6 +27,7 @@ cat prog.c
 ./prog | diff - prog.c
 ```
 
+
 ## Judges' remarks:
 
 At this point you might be wondering, [WTF](http://acronyms.thefreedictionary.com/WTF)?\*
@@ -47,6 +51,7 @@ Where did those underscores come from?  Well [RTFS](http://acronyms.thefreedicti
 
 If you are still puzzled, look at prog.c with your favorite text editor.
 
+
 ## Author's remarks:
 
 **Follow this instruction literally!**
@@ -64,6 +69,7 @@ Hint 2: Do `wc -c prog.c`.  This is very long one-liner.
 
 Spoiler: Open the source with an editor like `vim` or `emacs`.
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.