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/ollinger/README.md

@@ -29,7 +29,6 @@ Do get lost in the program's line of thought!  :-)
 
 ## Author's remarks:
 
-
 ### What's this?
 
 What do you see? On the left, you will see an enumeration of all successive