remove empty string in string interpolations (#49371)

diff --git a/packages/flutter_tools/test/commands.shard/hermetic/version_test.dart b/packages/flutter_tools/test/commands.shard/hermetic/version_test.dart
index 30b8c86..45a0330 100644
--- a/packages/flutter_tools/test/commands.shard/hermetic/version_test.dart
+++ b/packages/flutter_tools/test/commands.shard/hermetic/version_test.dart
@@ -30,7 +30,7 @@
         'version',
         '--no-pub',
       ]);
-      expect(testLogger.statusText, equals('v10.0.0\r\nv20.0.0\n' ''));
+      expect(testLogger.statusText, equals('v10.0.0\r\nv20.0.0\n'));
     }, overrides: <Type, Generator>{
       ProcessManager: () => MockProcessManager(),
     });