pub_restricted formatting breaks code with "Block" fn args

[alexmaco]

rustfmt generates invalid code after formatting code that uses the pub_restricted feature.
The breakage is new in the 0.7 release; in the 0.6.3 release the same erroneous line would be inserted, but it was commented out

input:

#![feature(pub_restricted)]

mod inner_mod {
    pub(super) fn func_name(
        abc: i32
    ) -> i32 {
        abc
    }
}

rustfmt.toml:

fn_args_layout = "Block"

incorrect 0.7 output:

#![feature(pub_restricted)]

mod inner_mod {
    pub(super) fn func_name(
        super) fn func_name(
        abc: i32
    ) -> i32 {
        abc
    }
}

incorrect 0.6.3 output:

#![feature(pub_restricted)]

mod inner_mod {
    pub(super) fn func_name(
        // super) fn func_name(
        abc: i32
    ) -> i32 {
        abc
    }
}

[ahti]

This also happens without fn_args_layout = "Block", using the same example code.

[topecongiro]

Closing since this is fixed on the current master.