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.

2001/kev/README.md

@@ -37,7 +37,7 @@ paddle. See below Alternate code.
 ## Try:
 
 ```sh
-./kev 
+./kev\
 ./kev localhost
 ```