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.

1991/ant/README.md

@@ -46,7 +46,6 @@ rest was unchanged.
 
 ### Alternate build:
 
-
 ```sh
 make alt
 ```

1991/buzzard/README.md

@@ -26,6 +26,7 @@ bugs.md](/bugs.md#1991-buzzard).
 ./buzzard
 ```
 
+
 ## Alternate code:
 
 This version changes the keys `f` for forward, `l` for left and `r` for right by
@@ -58,7 +59,6 @@ You are invited to try to cheat, ... if you can figure out how!  :-)
 
 ## Author's remarks:
 
-
 ### How to play
 
 When the game starts, you are at the far end of the maze from the exit, looking

1991/rince/README.md

@@ -30,7 +30,6 @@ The author set the maximum number of moves to 484.
 
 ### Alternate build:
 
-
 ```sh
 make alt
 ```

1991/westley/README.md

@@ -7,6 +7,7 @@ make all
 There is an [alternate version](#alternate-code) that is supposed to win all the
 time.
 
+
 ### Bugs and (Mis)features:
 
 The current status of this entry is:
@@ -20,7 +21,6 @@ For more detailed information see [1991 westley in bugs.md](/bugs.md#1991-westle
 
 ## To use:
 
-
 NOTE: we have provided a script to perform the below procedure which we include
 for the interested. See the [try](#try) section if you just want to play.
 
@@ -124,11 +124,11 @@ can lose if you cheat. That's supposed to happen. Can you win any other time?
 
 ### Alternate build:
 
-
 ```sh
 make alt
 ```
 
+
 ### Alternate use:
 
 Rather than use `ttt` try the script `ttt.alt` instead.