Sort keywords before checking the equality

GNU Readline always sorts completions before displaying them. There is a [rl_sort_completion_matches](https://git.savannah.gnu.org/cgit/readline.git/tree/complete.c#n411) in Readline's source code but it's not exposed as a config flag.

Author: tanloong

Lib/test/test_sqlite3/test_cli.py

@@ -273,7 +273,7 @@ def test_completion_order(self):
         self.assertEqual(len(indices), 2)
         start, end = indices[0] + 1, indices[1]
         candidates = tuple(map(str.strip, output_lines[start:end]))
-        self.assertEqual(candidates, SQLITE_KEYWORDS)
+        self.assertEqual(candidates, sorted(SQLITE_KEYWORDS))
 
 
 if __name__ == "__main__":