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

2013/endoh3/README.md

@@ -5,19 +5,22 @@ Yusuke Endoh\
 <https://github.com/mame/>\
 Mastodon: [@mame@ruby.social](https://ruby.social/@mame)
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To use:
 
 ```sh
 ./endoh3
 ```
 
-## Try:
+
+### Try:
 
 Trying this out will depend on how your system can play sounds. The author's
 remarks include some options for different operating systems.
@@ -30,6 +33,7 @@ echo 'CDEFGABc' | ./endoh3 | ruby wavify.rb > cde.wav
 
 There are also some other musical samples, twinkle.abc and menuet.abc.
 
+
 ## Judges' remarks:
 
 This program can toot out a tune that is small enough to posted to most social
@@ -44,6 +48,7 @@ might be called today. We recommend that you pick a responsible social media
 platform to post the program's output on. Nevertheless the award of this entry
 will remain the same for historical purposes.
 
+
 ## Author's remarks:
 
 ### Remarks