util: escaping object keys in util.inspect()

[vsemozhetbyt]

• Version: v4–v10
• Platform: Windows 7 x64
• Subsystem: util

'use strict';

console.log({ '\\n': '\\n' });

{ '\n': '\\n' }

Is it OK that we escape values here, but do not escape keys?

[addaleax]

I think we should escape the keys, yes.

[zheyz]

Hi,I picked this one as my first contribution to node. Any guidance is more than appreciated