`rustc --pretty normal` generates bad code with top level struct doc comments

[erickt]

This code:

/// blarg
struct Foo {
    x: usize,
}

fn main() {}

When run with rustc -Z unstable-options --pretty normal foo.rs produces this invalid code because it's losing a newline:

/// blargstruct Foo {
             x: usize,
         }

fn main() { }

With rustc -Z unstable-options --pretty expanded foo.rs, however, it produces this syntactically correct code:

#![feature(prelude_import)]
#![no_std]
#[prelude_import]
use std::prelude::v1::*;
#[macro_use]
extern crate std as std;
/// blarg
struct Foo {
    x: usize,
}

fn main() { }

[erickt]

Moving this bug over to syntex: serde-deprecated/syntex#31.

[erickt]

Oops, closed the wrong ticket.