REPL could print Symbol more verbosely

[bouzlibop]

• Version: v6.0.0 (also tested on v6.3.0)
• Platform: macOS Sierra Version: 10.12 Beta

Number(3) // prints 3
Object(Number(3)) // prints [Number: 3]

Symbol('a') // prints Symbol(a)
Object(Symbol('a')) //prints Symbol {}

Why in last case it does not print Symbol(a) as it does for primitive (line above) and for object as well in Chrome (see screen below)?

[addaleax]

PR: #7641