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.

1992/buzzard.2/README.md

@@ -53,6 +53,7 @@ Sorry, this is third!
 This alternate version, [buzzard.2.alt.c](buzzard.2.alt.c), does not contain a
 fix that the author notes in their remarks.
 
+
 ### Alternate build:
 
 To compile this alternate version: