Fix the rustfmt build

Author: scottmcm

src/expr.rs

@@ -225,6 +225,10 @@ pub(crate) fn format_expr(
         ast::ExprKind::Ret(Some(ref expr)) => {
             rewrite_unary_prefix(context, "return ", &**expr, shape)
         }
+        ast::ExprKind::Yeet(None) => Some("do yeet".to_owned()),
+        ast::ExprKind::Yeet(Some(ref expr)) => {
+            rewrite_unary_prefix(context, "do yeet ", &**expr, shape)
+        }
         ast::ExprKind::Box(ref expr) => rewrite_unary_prefix(context, "box ", &**expr, shape),
         ast::ExprKind::AddrOf(borrow_kind, mutability, ref expr) => {
             rewrite_expr_addrof(context, borrow_kind, mutability, expr, shape)

src/utils.rs

@@ -512,6 +512,7 @@ pub(crate) fn is_block_expr(context: &RewriteContext<'_>, expr: &ast::Expr, repr
         | ast::ExprKind::Range(..)
         | ast::ExprKind::Repeat(..)
         | ast::ExprKind::Ret(..)
+        | ast::ExprKind::Yeet(..)
         | ast::ExprKind::Tup(..)
         | ast::ExprKind::Type(..)
         | ast::ExprKind::Yield(None)