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.

2004/arachnid/README.md

@@ -45,6 +45,7 @@ instead.
 make alt
 ```
 
+
 ### Alternate use:
 
 Use `arachnid.alt` as you would `arachnid` above.

2004/gavare/README.md

@@ -21,6 +21,7 @@ for more details.
 ./gavare > ioccc_ray.ppm
 ```
 
+
 ## Alternate code:
 
 The alt code, [gavare.alt.c](gavare.alt.c), allows you to change the size of the

2004/gavin/README.md

@@ -90,6 +90,7 @@ you can use it with `QEMU`.
 make alt
 ```
 
+
 ### Alternate use:
 
 The use is mostly the same as `gavin` except that one initially executes `gavin.alt`

2004/jdalbec/README.md

@@ -32,6 +32,7 @@ For more detailed information see [2004 jdalbec in bugs.md](/bugs.md#2004-jdalbe
 ./try.sh
 ```
 
+
 ## Alternate code:
 
 This version lets you control how many numbers to show on a line before adding a

2004/kopczynski/README.md

@@ -34,7 +34,6 @@ does.
 
 ### Alternate build:
 
-
 ```sh
 make alt
 ```