From b3aac58db01c6bdc63452066bd9cd5f761e79044 Mon Sep 17 00:00:00 2001
From: Antoine Fourmy <antoine.fourmy@gmail.com>
Date: Tue, 12 Feb 2019 15:00:56 +0200
Subject: [PATCH] root_path cannot be None (#2792)

Fixes #2791
---
 third_party/2and3/flask/blueprints.pyi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/third_party/2and3/flask/blueprints.pyi b/third_party/2and3/flask/blueprints.pyi
index 772acdfba..d43f8e4ff 100644
--- a/third_party/2and3/flask/blueprints.pyi
+++ b/third_party/2and3/flask/blueprints.pyi
@@ -24,7 +24,7 @@ class Blueprint(_PackageBoundObject):
     json_decoder: Any = ...
     import_name: str = ...
     template_folder: Optional[str] = ...
-    root_path: Optional[str] = ...
+    root_path: str = ...
     name: str = ...
     url_prefix: Optional[str] = ...
     subdomain: Optional[str] = ...