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

2015/hou/README.md

@@ -3,24 +3,28 @@
     Qiming Hou <hqm03ster@gmail.com>\
     <http://www.houqiming.net/>
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To use:
 
 ```sh
 echo IOCCC | ./prog
 ```
 
-## Try:
+
+### Try:
 
 ```sh
 echo "" | ./prog
 ```
 
+
 ## Judges' remarks:
 
 A good start for understanding this entry might be
@@ -47,6 +51,7 @@ What happens with a large file? Something over 256K
 
 Where does that message come from?
 
+
 ## Author's remarks:
 
 This looks like a normal C program.
@@ -108,6 +113,7 @@ Tested platforms:
 * Windows 8.1, x86, MinGW gcc 4.6.2 (fails, prints error message)
 * Windows 8.1, x86, MinGW gcc 4.6.2 with -msse2 -mfpmath=sse (works)
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.