From f290a1d917c0fed95b199614ffda620cfcdee8da Mon Sep 17 00:00:00 2001
From: "Lumberbot (aka Jack)"
 <39504233+meeseeksmachine@users.noreply.github.com>
Date: Mon, 11 Aug 2025 23:05:07 -0700
Subject: [PATCH] =?UTF-8?q?Backport=20PR=20#7698:=20Fix=20open=20file=20wi?=
 =?UTF-8?q?th=20=E2=80=9C#=E2=80=9D=20in=20the=20filename=20(#7699)?=
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Co-authored-by: Vishnutheep B <vishnutheep@gmail.com>
---
 packages/application/src/pathopener.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/application/src/pathopener.ts b/packages/application/src/pathopener.ts
index 5dd9f2c72..bf54c3d53 100644
--- a/packages/application/src/pathopener.ts
+++ b/packages/application/src/pathopener.ts
@@ -15,7 +15,7 @@ class DefaultNotebookPathOpener implements INotebookPathOpener {
   open(options: INotebookPathOpener.IOpenOptions): WindowProxy | null {
     const { prefix, path, searchParams, target, features } = options;
     const url = new URL(
-      URLExt.join(prefix, path ?? ''),
+      URLExt.join(prefix, URLExt.encodeParts(path ?? '')),
       window.location.origin
     );
     if (searchParams) {