Fixed #21035 -- Changed docs to treat the acronym SQL phonetically.

The documentation and comments now all use 'an' to
refer to the word SQL and not 'a'.

tests/test_runner/tests.py

@@ -246,7 +246,7 @@ class Sqlite3InMemoryTestDbs(TestCase):
     available_apps = []
 
     @unittest.skipUnless(all(db.connections[conn].vendor == 'sqlite' for conn in db.connections),
-                         "This is a sqlite-specific issue")
+                         "This is an sqlite-specific issue")
     def test_transaction_support(self):
         """Ticket #16329: sqlite3 in-memory test databases"""
         old_db_connections = db.connections