message: fmt: Skip fn_sig_for_fn_abi()
diff: pub(crate) use self::returning::{can_return_to_ssa_var, codegen_return};
  // Copied from https://github.com/rust-lang/rust/blob/f52c72948aa1dd718cc1f168d21c91c584c0a662/src/librustc_middle/ty/layout.rs#L2301
  -pub(crate) fn fn_sig_for_fn_abi<'tcx>(
  - tcx: TyCtxt<'tcx>,
  - instance: Instance<'tcx>,
  -) -> ty::PolyFnSig<'tcx> {
  +#[rustfmt::skip]
  +pub(crate) fn fn_sig_for_fn_abi<'tcx>(tcx: TyCtxt<'tcx>, instance: Instance<'tcx>) -> ty::PolyFnSig<'tcx> {
  use rustc_middle::ty::subst::Subst;
  // FIXME(davidtwco,eddyb): A `ParamEnv` should be passed through to this function.
  @@ -73,10 +71,10 @@ pub(crate) fn fn_sig_for_fn_abi<'tcx>(
  let env_ty = tcx.mk_adt(pin_adt_ref, pin_substs);
  sig.map_bound(|sig| {
  - let state_did =
  - tcx.require_lang_item(rustc_hir::LangItem::GeneratorStateLangItem, None);
  + let state_did = tcx.require_lang_item(rustc_hir::LangItem::GeneratorStateLangItem, None);
  let state_adt_ref = tcx.adt_def(state_did);
  - let state_substs = tcx.intern_substs(&[sig.yield_ty.into(), sig.return_ty.into()]);
  + let state_substs =
  + tcx.intern_substs(&[sig.yield_ty.into(), sig.return_ty.into()]);
  let ret_ty = tcx.mk_adt(state_adt_ref, state_substs);
  tcx.mk_fn_sig(
  