From b8f318c303119c7048f898961f0b150e062f3a91 Mon Sep 17 00:00:00 2001
From: Caleb Cartwright <caleb.cartwright@outlook.com>
Date: Thu, 28 Jan 2021 19:14:44 -0600
Subject: [PATCH] fix: don't insert trailing comma on struct lit rest in mac
 def

---
 src/expr.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/expr.rs b/src/expr.rs
index 7dfa4d57b13..33add30c7c6 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -1629,7 +1629,10 @@ fn rewrite_struct_lit<'a>(
             nested_shape,
             tactic,
             context,
-            force_no_trailing_comma || has_base || !context.use_block_indent(),
+            force_no_trailing_comma
+                || has_base
+                || !context.use_block_indent()
+                || matches!(struct_rest, ast::StructRest::Rest(_)),
         );
 
         write_list(&item_vec, &fmt)?