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.

2000/jarijyrki/README.md

@@ -10,7 +10,7 @@ Jyrki Holopainen
 Forsellesintie 1-3A10  
 02700 Kauniainen  
 Finland  
-<https://web.archive.org/web/20061205082106/http://personal.eunet.fi/pp/halo/>  
+<https://web.archive.org/web/20061205082106/http://personal.eunet.fi/pp/halo/>
 
 
 ## To build:
@@ -117,7 +117,7 @@ Click the mouse or use the arrow keys.
 The currently selected cell is always in the edit state.  Press any key to add a
 character at the end of the formula; press backspace to delete the last one.
 
-##### Formulas   
+##### Formulas
 
 ```
 123.45