Add empty newline at the end of test

Author: llrs

tests/reg-tests-1e.R

@@ -2571,6 +2571,5 @@ stopifnot(identical(names(fr), nn))
 rbind(last =  proc.time() - .pt,
       total = proc.time())
 
-
 ## package_version can be converted back to its own original representation
-stopifnot(as.character(package_version("1.2-1")) == "1.2-1")
+stopifnot(as.character(package_version("1.2-1")) == "1.2-1")