update Map

tool/input_sdk/lib/core/map.dart

Index: tool/input_sdk/lib/core/map.dart
diff --git a/tool/input_sdk/lib/core/map.dart b/tool/input_sdk/lib/core/map.dart
index 755e7b891975565dfb4207d2001dbf1d9901dcf1..ac4581f7c004779f8a5592110a3a52f158ca4156 100644
--- a/tool/input_sdk/lib/core/map.dart
+++ b/tool/input_sdk/lib/core/map.dart
@@ -35,7 +35,7 @@ abstract class Map<K, V> {
    * `operator==` and `hashCode`, and it allows null as a key.
    * It iterates in key insertion order.
    */
-  factory Map() = LinkedHashMap<K, V>;
+  external factory Map();
 
   /**
    * Creates a [LinkedHashMap] instance that contains all key-value pairs of
@@ -244,7 +244,7 @@ abstract class Map<K, V> {
    * The values of [this].
    *
    * The values are iterated in the order of their corresponding keys.
-   * This means that iterating [keys] and [values] in parrallel will
+   * This means that iterating [keys] and [values] in parallel will
    * provided matching pairs of keys and values.
    *
    * The returned iterable has an efficient `length` method based on the