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.

1996/dalbec/README.md

@@ -1,9 +1,9 @@
 # Best Numerical Obfuscation
 
-John Dalbec  
-20 Squire's Ct.	(home address)  
-Canfield, OH 44406  
-US  
+John Dalbec\
+20 Squire's Ct.	(home address)\
+Canfield, OH 44406\
+US\
 <https://jpdalbec.people.ysu.edu>