Fix tmp/format-headers.sh, format headers

The script had "s surrounding the git ls-files command which turned it
to a single file which of course is wrong.

Ran script again fixing many README.md files that had incorrect number
of blank lines for critical headers.

This will have to be done a final but a good number of files have been
corrected.

2001/ctk/README.md

@@ -23,11 +23,11 @@ This alternate version adds to the movement keys `l` for right, `h` for left and
 
 ### Alternate build:
 
-
 ```sh
 make alt
 ```
 
+
 ### Alternate use:
 
 ```sh