spelling: that array is

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>

clippy_lints/src/trailing_empty_array.rs

@@ -60,7 +60,7 @@ fn is_struct_with_trailing_zero_sized_array(cx: &LateContext<'_>, item: &Item<'_
         if let Some(last_field) = data.fields().last();
         if let rustc_hir::TyKind::Array(_, rustc_hir::ArrayLen::Body(length)) = last_field.ty.kind;
 
-        // Then check if that that array zero-sized
+        // Then check if that array is zero-sized
         let length = Const::from_anon_const(cx.tcx, length.def_id);
         let length = length.try_eval_target_usize(cx.tcx, cx.param_env);
         if let Some(length) = length;