Remove making added files as changed.

pkg/analyzer/test/src/dart/analysis/driver_test.dart

Index: pkg/analyzer/test/src/dart/analysis/driver_test.dart
diff --git a/pkg/analyzer/test/src/dart/analysis/driver_test.dart b/pkg/analyzer/test/src/dart/analysis/driver_test.dart
index 30086bc9a58358309cc2958fb04d607d94dd6ff0..30f87f08b7b8176606813e156a1c851f3454ed08 100644
--- a/pkg/analyzer/test/src/dart/analysis/driver_test.dart
+++ b/pkg/analyzer/test/src/dart/analysis/driver_test.dart
@@ -302,9 +302,9 @@ main() {
     await _waitForIdle();
     assertNumberOfErrorsInB(0);
 
-    // Change 'b' t have a hint again.
-    // Add and remove 'b'.
-    // The file must be refreshed, and the hint must be reported.
+    // Change 'b' content so that it has a hint.
+    // Remove 'b' and add it again.
+    // The file 'b' must be refreshed, and the hint must be reported.
     provider.newFile(
         b,
         r'''