Revert "Format all multitests"

tests/language/override_inheritance_mixed_test.dart

Index: tests/language/override_inheritance_mixed_test.dart
diff --git a/tests/language/override_inheritance_mixed_test.dart b/tests/language/override_inheritance_mixed_test.dart
index 50ee0ad027ee9c5570ea9a8c8ac9b0da5367a2c5..9a43d159e25ae87bcbd0a95470f0f1379c38c9c8 100644
--- a/tests/language/override_inheritance_mixed_test.dart
+++ b/tests/language/override_inheritance_mixed_test.dart
@@ -25,7 +25,8 @@ abstract class J {
   member9() {} //# 09: continued
 }
 
-abstract class B extends A implements I, J {}
+abstract class B extends A implements I, J {
+}
 
 class Class extends B {
   member1() {} //# 01: continued