fails to format commented code: {…}

[matthiaskrgr]

/// ```
///  { … }
/// ```
fn main() {
  }

rustfmt silently bails out on this code which can be found in the clippy_lints package.

This silent bailout caused my to find #3008 and prevents all further formatting by cargo fmt on the clippy_lints crate.

[otavio]

This has been fixed by #3058. I think this could be closed.