format headers

We move `tmp/format-headers.sh` into `bin/format-headers.sh`.

We also add a few missing empty lines to `README.md`.

We add `bin/format-headers.sh` to the `bin/README.md`.

We run `bin/format-headers.sh` to perform the above.

Performed `make www` to accomplish the above and to test under macOS.

README.md

@@ -22,6 +22,7 @@ temp-test-ioccc GitHub repo.
 <!-- XXX - remove down to here in the final stages of the Great Fork Merge -->
 # The International Obfuscated C Code Contest
 
+
 ## **Obfuscate** | *verb* [with object]
 
 - render obscure, unclear, or unintelligible: the spelling changes will deform
@@ -33,6 +34,7 @@ obfuscatory | adjective
     late Middle English (as adjective): from late Latin **obfuscat-**
     'darkened', from the verb **obfuscare**, based on Latin **fuscus** 'dark'.
 
+
 ## **Obfuscation** | *noun*
 
 - the action of making something obscure, unclear, or unintelligible: when
@@ -44,6 +46,7 @@ mealy-mouthed denials and obfuscations.
 
 The official IOCCC website is [www.ioccc.org](https://www.ioccc.org).
 
+
 ## How it was started:
 
 The original inspiration of the International Obfuscated C Code Contest came