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.

2011/toledo/README.md

@@ -3,7 +3,7 @@
 Oscar Toledo G.    
 Mexico  
 <biyubi@gmail.com>   
-<https://nanochess.org>  
+<https://nanochess.org>
 
 ## To build:
 
@@ -99,7 +99,7 @@ Keys for player 2:
 * Left arrow  - Turn left
 * Right arrow - Turn right
 
-> Note: Numeric keys don't work. 
+> Note: Numeric keys don't work.
 
 If you don't like the keys assignment, you can change it in the
 Makefile.
@@ -184,7 +184,7 @@ Not really, just kidding :D
                                   .,,++=++-,.                @+      ==+              
                                         .,-++==+-,.          +@    ==+                
                                               ..,+++=+-,..   .@. +=+                  
-                                                     .,-+++++,@@==                    
+                                                     .,-+++++,@@==
 
 ```