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.

2019/dogon/README.md

@@ -62,7 +62,6 @@ In the interest of saving lives, this entry was not fuzzed.
 
 ## Author's remarks:
 
-
 ### What is it?
 
 Just run with no arguments on an X11-compatible system using one of the supplied

2019/duble/README.md

@@ -115,7 +115,6 @@ or `l` (they toggle).
 
 ## Author's remarks:
 
-
 ### Introduction:
 
 This program is a **graphics editor**, running in the terminal.

2019/endoh/README.md

@@ -55,7 +55,6 @@ ascii` when debugging it to reveal its purpose.
 
 ## Author's remarks:
 
-
 ### backtrace quine:
 
 Compile prog.c with no optimization.

2019/karns/README.md

@@ -19,7 +19,6 @@ STATUS: INABIAF - please **DO NOT** fix
 For more detailed information see [2019 karns in bugs.md](/bugs.md#2019-karns).
 
 
-
 ## To use:
 
 ```sh

2019/mills/README.md

@@ -16,7 +16,6 @@ STATUS: INABIAF - please **DO NOT** fix
 For more detailed information see [2019 mills in bugs.md](/bugs.md#2019-mills).
 
 
-
 ## To use:
 
 ```sh

2019/poikola/README.md

@@ -102,7 +102,6 @@ Nykänen](https://en.wikipedia.org/wiki/Matti_Nyk%C3%A4nen).
 
 ## Author's remarks:
 
-
 ### How to build:
 
 ```sh