From 6166b44555c52f68b1b1143b41317b088f067d56 Mon Sep 17 00:00:00 2001
From: Evert Pot <me@evertpot.com>
Date: Fri, 9 Oct 2026 21:29:25 -0400
Subject: [PATCH 1/2] Fix serialization of bytes <= 0xf , they need to be
 padded by a 0

---
 Makefile          | 2 +-
 src/serializer.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index ffc9f47..9e417b6 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ build: dist/build cjs/index.cjs
 
 .PHONY: clean
 clean:
-	rm -r dist/ cjs/
+	rm -rf dist/ cjs/ test/httpwg-tests
 
 .PHONY: test
 test: lint test/httpwg-tests/list.json dist/build
diff --git a/src/serializer.ts b/src/serializer.ts
index 27e81d3..88d16f3 100644
--- a/src/serializer.ts
+++ b/src/serializer.ts
@@ -149,7 +149,7 @@ export function serializeDisplayString(input: DisplayString): string {
       || char <= 0x1f
       || char >= 0x7f
     ) {
-      out += '%' + char.toString(16);
+      out += '%' + char.toString(16).padStart(2, '0');
     } else {
       out += String.fromCharCode(char);
     }

From 9a961cd574db7f56af2b911dd51cceb012d91389 Mon Sep 17 00:00:00 2001
From: Evert Pot <me@evertpot.com>
Date: Fri, 9 Oct 2026 21:31:56 -0400
Subject: [PATCH 2/2] Update changelog

---
 changelog.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/changelog.md b/changelog.md
index f15acbc..6e9369e 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,6 +1,13 @@
 ChangeLog
 =========
 
+2.1.1 (????-??-??)
+------------------
+
+* Fix: serialization of displaystring that encodes to byte values under 0xf,
+  they were missing the 0 padding of %0?.
+
+
 2.1.0 (2026-09-11)
 ------------------