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

2015/endoh3/README.md

@@ -19,7 +19,7 @@ make
 ```
 
 
-## Try:
+### Try:
 
 To see the original [mullender](mullender.c) in action:
 
@@ -59,6 +59,7 @@ instructions
 clue, see the end of the author's remarks.) If in doubt, use
 [APOUT](https://github.com/DoctorWkt/Apout).
 
+
 ## Author's remarks:
 
 ### Hint / Compatibility
@@ -238,6 +239,7 @@ short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886,
 335,-27277,-30776,20480,0};
 ```
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.