Incorrect stringify output

[pdonias]

For the following inputs, the stringify method gives the wrong TOML outputs:

{
  foo: {
    a: 'b'
  },
  bar: 'baz'
}

gives the following TOML:

"baz"bar=

[foo]
a = "b"

and this:

{
  foo: {},
  bar: 'baz'
}

gives:

"baz"=

[foo]