place conditions on same line (#40391)

packages/flutter_test/lib/flutter_test.dart

@@ -46,8 +46,7 @@ library flutter_test;
 
 export 'dart:async' show Future;
 
-export 'src/_goldens_io.dart'
-  if (dart.library.html) 'src/_goldens_web.dart';
+export 'src/_goldens_io.dart' if (dart.library.html) 'src/_goldens_web.dart';
 export 'src/accessibility.dart';
 export 'src/all_elements.dart';
 export 'src/binding.dart';

packages/flutter_test/lib/src/binding.dart

@@ -19,8 +19,7 @@ import 'package:test_api/test_api.dart' as test_package;
 import 'package:stack_trace/stack_trace.dart' as stack_trace;
 import 'package:vector_math/vector_math_64.dart';
 
-import '_binding_io.dart'
-  if (dart.library.html) '_binding_web.dart' as binding;
+import '_binding_io.dart' if (dart.library.html) '_binding_web.dart' as binding;
 import 'goldens.dart';
 import 'platform.dart';
 import 'stack_manipulation.dart';

packages/flutter_test/lib/src/goldens.dart

@@ -7,8 +7,7 @@ import 'dart:typed_data';
 
 import 'package:flutter/foundation.dart';
 import 'package:path/path.dart' as path;
-import '_goldens_io.dart'
-  if (dart.library.html) '_goldens_web.dart' as _goldens;
+import '_goldens_io.dart' if (dart.library.html) '_goldens_web.dart' as _goldens;
 
 /// Compares image pixels against a golden image file.
 ///