util.inspect() on Errors does not include stack trace

`util.inspect(new Error('foo'))` in Node prints the stack trace of the error:
```
Error: foo
at repl:1:15
at Script.runInThisContext (vm.js:122:20)
at REPLServer.defaultEval (repl.js:334:29)
at bound (domain.js:395:14)
at REPLServer.runBound [as eval] (domain.js:408:12)
at REPLServer.onLine (repl.js:641:10)
at REPLServer.emit (events.js:187:15)
at REPLServer.EventEmitter.emit (domain.js:441:20)
at REPLServer.Interface._onLine (readline.js:301:10)
at REPLServer.Interface._line (readline.js:673:8)
```
This shim however just returns
```
[Error: foo]
```
Which is really bad if this is used as part of a logging tool.

定位 util.inspect() 的实现及其对 Error 对象的处理，然后将 shim 的输出与 issue 中显示的 Node 输出进行比较。确认检查 Error 时会包含其堆栈跟踪，同时保留预期的消息格式。

由索引模型根据 Issue 内容生成。