Rustfmt formats generic args weirdly with tabs

[Boscop]

I have hard_tabs enabled.
This is how it formats it:

impl<
		Target: FromEvent<A> + FromEvent<B>,
		A: Widget2<Ctx = C>,
		B: Widget2<Ctx = C>,
		C: for<'a> CtxFamily<'a>,
	> Widget2 for WidgetEventLifter<Target, A, B>
{
	type Ctx = C;
	type Event = Vec<Target>;

What I'd expect:

impl<
	Target: FromEvent<A> + FromEvent<B>,
	A: Widget2<Ctx = C>,
	B: Widget2<Ctx = C>,
	C: for<'a> CtxFamily<'a>,
> Widget2 for WidgetEventLifter<Target, A, B> {
	type Ctx = C;
	type Event = Vec<Target>;