Fixes for new rustc changes.

src/closures.rs

@@ -151,7 +151,6 @@ fn rewrite_closure_with_block(
             id: ast::NodeId::root(),
             kind: ast::StmtKind::Expr(ptr::P(body.clone())),
             span: body.span,
-            tokens: None,
         }],
         id: ast::NodeId::root(),
         rules: ast::BlockCheckMode::Default,

src/items.rs

@@ -2118,7 +2118,7 @@ pub(crate) fn span_hi_for_param(context: &RewriteContext<'_>, param: &ast::Param
 
 pub(crate) fn is_named_param(param: &ast::Param) -> bool {
     if let ast::PatKind::Ident(_, ident, _) = param.pat.kind {
-        ident.name != symbol::kw::Invalid
+        ident.name != symbol::kw::Empty
     } else {
         true
     }

src/macros.rs

@@ -158,7 +158,7 @@ fn rewrite_macro_name(
         format!("{}!", pprust::path_to_string(path))
     };
     match extra_ident {
-        Some(ident) if ident.name != kw::Invalid => format!("{} {}", name, ident),
+        Some(ident) if ident.name != kw::Empty => format!("{} {}", name, ident),
         _ => name,
     }
 }