fix improper use of whitespace in README.md files

The use of the markdown trailing whitespace to indicate
line break should NOT be done when the following line is empty.

This removes such improper use of whitespace in README.md files.

1989/fubar/README.md

@@ -5,7 +5,7 @@ Sequent Computer Systems, Inc
 15450 SW Koll Parkway  
 Beaverton, OR  
 97006  
-US  
+US
 
 ## To build:
 
@@ -45,7 +45,7 @@ is not in the repository.
 In a nutshell, this is probably the slowest and most
 obnoxious factorial program ever written.  Unfortunately, 
 the name of the C source must be "ouroboros.c"; the name is 
-hard-coded into the program.  
+hard-coded into the program.
 
 The source is a legal shell script and a legal C program.  
 The shell script compiles itself, and then executes the