Fix the pretty print tests to handle terminal newlines. Sorry!

src/test/pretty/example1.rs

@@ -1,3 +1,3 @@
 // pp-exact
 
-fn main() { }
+fn main() { }

src/test/pretty/example2.pp

@@ -1,3 +1,3 @@
 // pp-exact:example2.pp
 
-fn main() { }
+fn main() { }

src/test/pretty/example2.rs

@@ -4,4 +4,4 @@ fn
 main
 ()
 {
-}
+}