dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/mirror_printer_test.dart

Index: tests/compiler/dart2js_extra/mirror_printer_test.dart
diff --git a/tests/compiler/dart2js_extra/mirror_printer_test.dart b/tests/compiler/dart2js_extra/mirror_printer_test.dart
index 72e48784e0d8efd0f77c5e0486e01548da42fdb4..bc40d4d01d7cea48a809ef6f33e709595a4a9948 100644
--- a/tests/compiler/dart2js_extra/mirror_printer_test.dart
+++ b/tests/compiler/dart2js_extra/mirror_printer_test.dart
@@ -51,15 +51,16 @@ class MirrorPrinter {
   String stringifyInstance(InstanceMirror mirror) {
     var reflectee = mirror.reflectee;
     if (reflectee is String) return '"${reflectee}"';
-    if (reflectee is Null || reflectee is bool || reflectee is num ||
-        reflectee is List || reflectee is Map) {
+    if (reflectee is Null ||
+        reflectee is bool ||
+        reflectee is num ||
+        reflectee is List ||
+        reflectee is Map) {
       return '$reflectee';
     }
     StringBuffer buffer = new StringBuffer();
     Map<Symbol, DeclarationMirror> declarations = mirror.type.declarations;
-    buffer
-        ..write(n(mirror.type.simpleName))
-        ..write('(');
+    buffer..write(n(mirror.type.simpleName))..write('(');
     bool first = true;
     declarations.forEach((Symbol name, DeclarationMirror declaration) {
       if (declaration is! VariableMirror) return;
@@ -72,9 +73,9 @@ class MirrorPrinter {
         buffer.write(', ');
       }
       buffer
-          ..write(n(name))
-          ..write(': ')
-          ..write(stringifyInstance(mirror.getField(name)));
+        ..write(n(name))
+        ..write(': ')
+        ..write(stringifyInstance(mirror.getField(name)));
     });
     buffer.write(')');
     return buffer.toString();
@@ -168,7 +169,7 @@ class MirrorPrinter {
   writeLibrary(LibraryMirror library) {
     w('library ${n(library.simpleName)};\n\n');
     library.declarations.values
-        .where((d)=> d is! TypeMirror)
+        .where((d) => d is! TypeMirror)
         .forEach(writeDeclaration);
     w('\n');
   }