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.

1992/buzzard.2/README.md

@@ -1,9 +1,9 @@
 # Best Language Tool
 
-Sean Barrett  
-Software Construction Company  
-430 Southwest Parkway, #1906  
-College Station, TX 77840  
+Sean Barrett\
+Software Construction Company\
+430 Southwest Parkway, #1906\
+College Station, TX 77840\
 US
 
 ## To build: