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

2013/cable1/README.md

@@ -3,19 +3,22 @@
 Adrian Cable\
 <adrian.cable@gmail.com>
 
+
 ## To build:
 
 ```sh
 make
 ```
 
+
 ## To use:
 
 ```sh
 ./cable1 name group1 group2
 ```
 
-## Try:
+
+### Try:
 
 ```sh
 ./cable1 obama republican democrat
@@ -25,6 +28,7 @@ make
 ./cable1 lincoln republican democrat
 ```
 
+
 ## Judges' remarks:
 
 Partisan may be defined as a strong supporter of a cause, party or person.
@@ -86,6 +90,7 @@ End of important 2023 update to this historic note.
 
 So how does a one line C source know so much?  Hint: it doesn't.
 
+
 ## Author's remarks:
 
 ### Presidents of the United States of America!
@@ -123,6 +128,7 @@ table?
 `clang` warns about a missing type specifier for `main()`, and that implicit
 function declarations are invalid in C99 (but still accepts them).
 
+
 ## Copyright and CC BY-SA 4.0 License:
 
 This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.