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.

2005/boutines/README.md

@@ -20,7 +20,6 @@ ruby -e '20.times{puts "#{rand} #{rand}"}' | ./boutines > test.svg
 
 ### Try:
 
-
 ```sh
 ./boutines < input.txt > result.svg
 ```

2005/mikeash/README.md

@@ -33,7 +33,6 @@ under 64-bit (x86_64, arm64) machines too.
 ```
 
 
-
 ## Judges' remarks:
 
 Having problems speaking code?  Do you [LISP][]?  Parenthetically

2005/mynx/README.md

@@ -58,7 +58,6 @@ must just appreciate the entry for what it once was.
 
 ### Alternate build:
 
-
 ```sh
 make alt
 ```

2005/persano/README.md

@@ -41,6 +41,7 @@ let it work with Windows.
 make alt
 ```
 
+
 ### Alternate use:
 
 Use `persano.alt` as you would `persano` above.

2005/toledo/README.md

@@ -34,6 +34,7 @@ To compile the alternate versions:
 make alt
 ```
 
+
 ### Alternate use:
 
 Use Use `toledo2` and `toledo3` as you would `toledo` above.

2005/vince/README.md

@@ -15,7 +15,7 @@ make
 ```
 
 
-## Try:
+### Try:
 
 When running this in the program's window try hitting space a few times and see
 what happens!
@@ -35,6 +35,7 @@ To compile this alternate version:
 make alt
 ```
 
+
 ### Alternate use:
 
 Use `vince.alt` as you would `vince` above.
@@ -59,7 +60,6 @@ Challenge: Try modifying the texture to something of your own design.
 
 ## Author's remarks:
 
-
 ### ABUSE OF RULES
 
 * The executable needs to read in its own source code in order to run. As