Format all tests.

tests/language/prefix10_negative_test.dart

Index: tests/language/prefix10_negative_test.dart
diff --git a/tests/language/prefix10_negative_test.dart b/tests/language/prefix10_negative_test.dart
index 1f0ff83e999f4436f510cdfc8d137286f99d170e..c660513e531655a3d28925866fe2f1845a69a4f3 100644
--- a/tests/language/prefix10_negative_test.dart
+++ b/tests/language/prefix10_negative_test.dart
@@ -6,6 +6,7 @@
 // Type parameters can shadow a library prefix.
 
 library Prefix10NegativeTest.dart;
+
 import "package:expect/expect.dart";
 import "library10.dart" as T;
 
@@ -13,7 +14,7 @@ class P<T> {
   P.named(T this.fld);
   T fld;
   main() {
-    var i = new T.Library10(10);  // This should be an error.
+    var i = new T.Library10(10); // This should be an error.
     Expect.equals(10, i.fld);
   }
 }