Update Lib/test/test_dbm_sqlite3.py

Co-authored-by: Alex Waygood <[email protected]>

Author: erlend-aasland

Lib/test/test_dbm_sqlite3.py

@@ -7,6 +7,9 @@
 from test.support import cpython_only, import_helper, os_helper
 
 dbm_sqlite3 = import_helper.import_module("dbm.sqlite3")
+# N.B. The test will fail if the sqlite3 import is above the import of dbm.sqlite3.
+# This is deliberate: if the import helper managed to import dbm.sqlite3,
+# we must inevitably be able to import sqlite3. Else, we have a problem.
 import sqlite3
 from dbm.sqlite3 import _normalize_uri