format with Dart 2.14-dev
diff --git a/lib/src/builder.dart b/lib/src/builder.dart
index fbc4c74..b4e1876 100644
--- a/lib/src/builder.dart
+++ b/lib/src/builder.dart
@@ -667,7 +667,7 @@
     Iterable<_MockTarget> mockTargets, {
     required this.assetUris,
     required LibraryElement entryLib,
-  })   : sourceLibIsNonNullable = entryLib.isNonNullableByDefault,
+  })  : sourceLibIsNonNullable = entryLib.isNonNullableByDefault,
         typeProvider = entryLib.typeProvider,
         typeSystem = entryLib.typeSystem {
     for (final mockTarget in mockTargets) {