--- a/mercurial/url.py	Sun Jan 05 22:26:16 2025 -0500
+++ b/mercurial/url.py	Mon Jan 06 00:30:55 2025 -0500
@@ -261,7 +261,7 @@
 
 if has_https:
 
-    def _generic_proxytunnel(self: "httpsconnection"):
+    def _generic_proxytunnel(self: httpsconnection):
         headers = self.headers  # pytype: disable=attribute-error
         proxyheaders = {
             pycompat.bytestr(x): pycompat.bytestr(headers[x])