replace trailing whitespace with blackslash in README.md

As an alternative to the markdown trailing whitespace as a line
break, we use a trailing blackslash as a markdown line break.

1998/tomtorfs/README.md

@@ -1,10 +1,10 @@
 # Best Self-Documenting
 
-Tom Torfs  
-De Nayer Instituut  
-Cuperuslei 12          (home address)  
-2220 Heist-op-den-Berg  
-Belgium  
+Tom Torfs\
+De Nayer Instituut\
+Cuperuslei 12          (home address)\
+2220 Heist-op-den-Berg\
+Belgium\
 <https://web.archive.org/web/20010520021948/http://members.nbci.com/tomtorfs/>
 
 ## To build: