Spelling fixes e to i.

sdk/lib/_internal/js_runtime/lib/js_helper.dart

Index: sdk/lib/_internal/js_runtime/lib/js_helper.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/js_helper.dart b/sdk/lib/_internal/js_runtime/lib/js_helper.dart
index d0e60d9ec0734ec19b873706a3ed8159e95d3994..3bb3da1221c63e121daf61b96f6c8ebe86ace34e 100644
--- a/sdk/lib/_internal/js_runtime/lib/js_helper.dart
+++ b/sdk/lib/_internal/js_runtime/lib/js_helper.dart
@@ -2247,7 +2247,7 @@ class ExceptionAndStackTrace {
  */
 unwrapException(ex) {
   /// If error implements Error, save [ex] in [error.$thrownJsError].
-  /// Otherwise, do nothing. Later, the stack trace can then be extraced from
+  /// Otherwise, do nothing. Later, the stack trace can then be extracted from
   /// [ex].
   saveStackTrace(error) {
     if (error is Error) {