Spelling fixes e to i.

tests/lib_strong/html/element_test.dart

Index: tests/lib_strong/html/element_test.dart
diff --git a/tests/lib_strong/html/element_test.dart b/tests/lib_strong/html/element_test.dart
index c1f74b586221fb298e32fe6f7d72c76b2cb8641d..2fdd9ec93fd300019b02e81dc43be02702be1bef 100644
--- a/tests/lib_strong/html/element_test.dart
+++ b/tests/lib_strong/html/element_test.dart
@@ -934,7 +934,7 @@ main() {
     // There are two interesting things that are checked here from the viewpoint
     // of the dart2js implementation of a 'native' class:
     //
-    //   1. Some methods are implementated from by 'Object' or 'Interceptor';
+    //   1. Some methods are implemented from by 'Object' or 'Interceptor';
     //      some of these tests simply check that a method can be called.
     //   2. Some methods are implemented by mixins.