fix a few more standard header lines in winner README.md files

1989/jar.1/README.md

@@ -28,10 +28,12 @@ NOTE: this will run the program itself:
 make clobber all
 ```
 
+
 ## Alternate code:
 
 This code, which prints something slightly different, is provided as well.
 
+
 ### Alternate build:
 
 NOTE: this will run the program itself.

1989/ovdluhe/README.md

@@ -38,6 +38,7 @@ by chance or is killed.
 ./ovdluhe < README.md
 ```
 
+
 ## Alternate code:
 
 The author suggested that one varies the definition of `P` from 2 through 10. As
@@ -46,7 +47,6 @@ it's a `#define` it's easy to set up.
 
 ### Alternate build:
 
-
 ```sh
 make CFLAGS="-DP=9" clobber alt
 ```

1989/paul/README.md

@@ -20,6 +20,7 @@ out. See [alternate code](#alternate-code) below for more details.
 ./paul
 ```
 
+
 ## Alternate code:
 
 This version was described by the author like:
@@ -30,6 +31,7 @@ the program.  Besides it is fun to watch the tape zooming back
 and forth as the program runs.  A much better debugger or trace
 could easily be added.
 
+
 ### Alternate build:
 
 ```sh

1989/tromp/README.md

@@ -57,6 +57,7 @@ loser](https://web.archive.org/web/20181023221954/https://www.chicagotribune.com
 The author provided an alternate version of the code with some improvements. See
 the judges' additional remarks in the author's remarks, for more details.
 
+
 ### Alternate build:
 
 ```sh