Visibility clause duplicated into named unit struct

[stoklund]

Examples with rustfmt 0.9.0-nightly:

$ echo "pub(super) struct Foo();" | rustfmt
pub(super) struct Foo(super);
$ echo "pub(crate) struct Foo();" | rustfmt
pub(crate) struct Foo(crate);
$ echo "pub(in self) struct Foo();" | rustfmt
pub(self) struct Foo(in self);

[nrc]

Could you try this with rustfmt-nightly please? 0.9 is rather old now. (You'll need to force install rustfmt-nightly from Cargo).

[topecongiro]

This still happens with both rustfmt-nightly 0.2.13 and the latest master.