gh-111724: Fix doctest `ResourceWarning` in `howto/descriptor.rst` (#111725)

Close database connection explicitly in test cleanup.

diff --git a/Doc/howto/descriptor.rst b/Doc/howto/descriptor.rst
index 024c1eb3e3b20000163dd830d121d6869a586ef1..90d67d84d0ef08c72d90d3e0fa4a63613e11c03a 100644 (file)
--- a/Doc/howto/descriptor.rst
+++ b/Doc/howto/descriptor.rst
@@ -943,6 +943,10 @@ it can be updated:
     >>> Movie('Star Wars').director
     'J.J. Abrams'
 
+.. testcleanup::
+
+   conn.close()
+
 
 Pure Python Equivalents
 ^^^^^^^^^^^^^^^^^^^^^^^