flutter format

Signed-off-by: Sahil Kumar <[email protected]>

lib/src/extension.dart

@@ -8,7 +8,7 @@ extension StringExtension on String {
 extension ListX<T> on List<T> {
   /// Insert any item<T> inBetween the list items
   List<T> insertBetween(T item) => expand((e) sync* {
-    yield item;
+        yield item;
-    yield e;
+        yield e;
-  }).skip(1).toList(growable: false);
+      }).skip(1).toList(growable: false);
 }