Roll to pickup pool changes

packages/barback/lib/src/transformer/transformer.dart

Index: packages/barback/lib/src/transformer/transformer.dart
diff --git a/packages/barback/lib/src/transformer/transformer.dart b/packages/barback/lib/src/transformer/transformer.dart
index b40d61de37c07c2d78925e5ecdccf80df6cb6905..f87f067d2d85e54c8d772a1b17b636495e6dc502 100644
--- a/packages/barback/lib/src/transformer/transformer.dart
+++ b/packages/barback/lib/src/transformer/transformer.dart
@@ -33,7 +33,8 @@ abstract class Transformer {
   Transformer() {
     if (allowedExtensions == null) return;
 
-    var invalidExtensions = allowedExtensions.split(" ")
+    var invalidExtensions = allowedExtensions
+        .split(" ")
         .where((extension) => !extension.startsWith("."))
         .map((extension) => '"$extension"');
     if (invalidExtensions.isEmpty) return;