From 015e39776fcd951d208d7fbb5f4a4de4efb4445f Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sun, 2 Jul 2023 21:11:09 -0700
Subject: [PATCH] No need for single-element vec for chaining one element

---
 test_suite/tests/test_de.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test_suite/tests/test_de.rs b/test_suite/tests/test_de.rs
index 85fd1bd5..2c97df37 100644
--- a/test_suite/tests/test_de.rs
+++ b/test_suite/tests/test_de.rs
@@ -14,6 +14,7 @@ use std::collections::{BTreeMap, BTreeSet, HashMap, HashSet};
 use std::default::Default;
 use std::ffi::{CStr, CString, OsString};
 use std::fmt::Debug;
+use std::iter;
 use std::net;
 use std::num::{
     NonZeroI128, NonZeroI16, NonZeroI32, NonZeroI64, NonZeroI8, NonZeroIsize, NonZeroU128,
@@ -199,7 +200,7 @@ fn assert_de_tokens_ignore(ignorable_tokens: &[Token]) {
     ]
     .into_iter()
     .chain(ignorable_tokens.iter().copied())
-    .chain(vec![Token::MapEnd])
+    .chain(iter::once(Token::MapEnd))
     .collect();
 
     let expected = IgnoreBase { a: 1 };