[2.1.x] Refs #30013 -- Fixed SchemaEditor.quote_value() test for mysqlclient 1.3.14+.

Backport of 734ce718 from master.

tests/backends/mysql/test_schema.py

@@ -7,11 +7,12 @@ from django.test import TestCase
 @unittest.skipUnless(connection.vendor == 'mysql', 'MySQL tests')
 class SchemaEditorTests(TestCase):
     def test_quote_value(self):
+        import MySQLdb
         editor = connection.schema_editor()
         tested_values = [
             ('string', "'string'"),
             (42, '42'),
-            (1.754, '1.754'),
+            (1.754, '1.754e0' if MySQLdb.version_info >= (1, 3, 14) else '1.754'),
             (False, '0'),
         ]
         for value, expected in tested_values: