Run formatter on a few frontend and kernel files that hadn't been formatted.

pkg/front_end/testcases/expressions.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 foo({fisk}) {
   print(fisk);
 }
 
 caller(f) {
   f();
 }
 
 main() {
   int i = 0;
   print(i == 1 ? "bad" : "good");
   print("$i");
   print("'$i'");
   print(" '${i}' ");
   print(" '${i}' '${i}'");
   print(" '$i' '${i}'");
   print("foo" "bar");
   print(" '${i}' '${i}'" " '$i' '${i}'");
   try {
     throw "fisk";
   } on String catch (e, s) {
     print(e);
     if (s != null) print(s);
   }
-  for(;false;) {}
+  for (; false;) {}
   var list = ["Hello, World!"];
   print(list[i]);
   list[i] = "Hello, Brave New World!";
   print(list[i]);
   i = 87;
   print(-i);
   print(~i);
   print(!(i == 42));
   print(--i);
   print(++i);
   print(i--);
   print(i++);
   print(new Object());
   print(const Object());
   print((new List<String>(2)).runtimeType);
   foo(fisk: "Blorp gulp");
   f() {
     print("f was called");
   }
+
   caller(f);
   caller(() {
     print("<anon> was called");
   });
   g([message]) {
     print(message);
   }
+
   g("Hello, World");
   caller(([x]) {
     print("<anon> was called with $x");
   });
   h({message}) {
     print(message);
   }
+
   h(message: "Hello, World");
   caller(({x}) {
     print("<anon> was called with $x");
   });
   print((int).toString());
   print(int);
   print(int..toString());
   try {
     print(int?.toString());
     throw "Shouldn't work";
   } on NoSuchMethodError catch (e) {
     print("As expected: $e");
   }
   print(int.parse("42"));
 }