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/williams/README.md

@@ -4,6 +4,7 @@
 make
 ```
 
+
 ### Bugs and (Mis)features:
 
 The current status of this entry is:
@@ -15,7 +16,6 @@ STATUS: known bug - please help us fix
 For more detailed information see [2001 williams in bugs.md](/bugs.md#2001-williams).
 
 
-
 ## To use:
 
 ```sh