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.

2011/vik/README.md

@@ -57,6 +57,7 @@ make alt
 
 ```
 
+
 ### Alternate use:
 
 Use `vik.alt` as you would `vik` above.