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.

2019/burton/README.md

@@ -1,6 +1,6 @@
 # Best one-liner
 
-Dave Burton  
+Dave Burton
 
 ## To build:
 
@@ -63,7 +63,7 @@ This program follows FreeBSD and macOS, the arbiters of correct for these purpos
 ### Limits:
 
 Requires the C locale and ASCII character set.   
-Input should be less than ten million octets "toavoidthisproblem".   
+Input should be less than ten million octets "toavoidthisproblem".
 
 ### See Also: