Format all tests.

tests/language_strong/switch_fallthru_test.dart

Index: tests/language_strong/switch_fallthru_test.dart
diff --git a/tests/language_strong/switch_fallthru_test.dart b/tests/language_strong/switch_fallthru_test.dart
index a3c8504bec37d3b5b1b3f28a15899908eb101442..0618032a4ae2f38b2102a056a1a36724c3e9dc1d 100644
--- a/tests/language_strong/switch_fallthru_test.dart
+++ b/tests/language_strong/switch_fallthru_test.dart
@@ -14,10 +14,10 @@ class SwitchFallthruTest {
         break;
       case 1:
         result = "one";
-        // fall-through, throw implicit FallThroughError here.
+      // fall-through, throw implicit FallThroughError here.
       case 9:
         result = "nine";
-        // No implicit FallThroughError at end of switch statement.
+      // No implicit FallThroughError at end of switch statement.
     }
     return result;
   }