fix tidy: README order, trailing newlines in whitespace tests

Author: Brace1000

tests/ui/whitespace/ascii_whitespace_excludes_vertical_tab.rs

@@ -19,4 +19,3 @@ fn main() {
         "regular space should split correctly");
 
 }
-

tests/ui/whitespace/vertical_tab_lexer.rs

@@ -55,4 +55,4 @@ fn main() {
     // add them up so the compiler doesn't complain about unused variables
     let _sum = _ws1 + _ws2 + _ws3 + _ws4 + _ws5 + _ws6 + _ws7;
     println!("{}", _sum);
-}
+}