Re-land "Format all multitests"

tests/language/async_or_generator_return_type_stacktrace_test.dart

Index: tests/language/async_or_generator_return_type_stacktrace_test.dart
diff --git a/tests/language/async_or_generator_return_type_stacktrace_test.dart b/tests/language/async_or_generator_return_type_stacktrace_test.dart
index 9326d89e2b330f86e2714a75445bed65ac7b917e..272e11045c4119c0111d512200eb9e55a3055693 100644
--- a/tests/language/async_or_generator_return_type_stacktrace_test.dart
+++ b/tests/language/async_or_generator_return_type_stacktrace_test.dart
@@ -11,25 +11,25 @@ void badReturnTypeSyncStar() sync* {} // //# 03: static type warning
 main() {
   try {
     badReturnTypeAsync(); // //# 01: continued
-  } catch(e, st) {
+  } catch (e, st) {
     Expect.isTrue(e is TypeError, "wrong exception type");
-    Expect.isTrue(st.toString().contains("badReturnTypeAsync"),
-                  "missing frame");
+    Expect.isTrue(
+        st.toString().contains("badReturnTypeAsync"), "missing frame");
   }
 
   try {
     badReturnTypeAsyncStar(); // //# 02: continued
-  } catch(e, st) {
+  } catch (e, st) {
     Expect.isTrue(e is TypeError, "wrong exception type");
-    Expect.isTrue(st.toString().contains("badReturnTypeAsyncStar"),
-                  "missing frame");
+    Expect.isTrue(
+        st.toString().contains("badReturnTypeAsyncStar"), "missing frame");
   }
 
   try {
     badReturnTypeSyncStar(); // //# 03: continued
-  } catch(e, st) {
+  } catch (e, st) {
     Expect.isTrue(e is TypeError, "wrong exception type");
-    Expect.isTrue(st.toString().contains("badReturnTypeSyncStar"),
-                  "missing frame");
+    Expect.isTrue(
+        st.toString().contains("badReturnTypeSyncStar"), "missing frame");
   }
-}
+}