fix more README.md headers

1986/marshall/README.md

@@ -42,7 +42,8 @@ To see if your compiler has the problems noted:
 make alt
 ```
 
-### Alternate run:
+
+### Alternate try:
 
 ```sh
 ./marshall.alt

1987/wall/README.md

@@ -40,7 +40,7 @@ m*m
 
 ```
 
-### Also try:
+You may also wish to try:
 
 ```sh
 ./wall | bc

1990/baruch/README.md

@@ -64,6 +64,7 @@ This program reads an integer between 4 and 99 from the `stdin`.
 NOTE: The original program did not have a newline at the end of the file.  We
 added a final newline to the file to make unpacking easy.
 
+
 ## Authors' remarks:
 
 The goal of this work was to write a program that solves the classic [n-queens

1990/jaw/README.md

@@ -76,6 +76,7 @@ cmp ../jaw.c jaw.c
 cmp ../README.md README.md
 ```
 
+
 ## Authors' remarks:
 
 ### ABSTRACT

1991/davidguy/README.md

@@ -62,6 +62,7 @@ explain this further.
 We are pleased that this entry has helped bring new 'life' into
 the contest.
 
+
 ## Authors' remarks:
 
 The program is a fully-functional X client.  It talks directly to

2014/birken/README.md

@@ -64,6 +64,7 @@ binary content communicated between client and server.
 So how does this program do it?  A trek though the cloak of
 obfuscation awaits the reader of the source!
 
+
 ## Authors' remarks:
 
 ### Abstract