Fix run_pty() doesn't return and test hangs

Author: tanloong

Lib/test/test_sqlite3/test_cli.py

@@ -239,7 +239,7 @@ def test_nothing_to_complete(self):
 
     def test_completion_order(self):
         script = "from sqlite3.__main__ import main; main()"
-        input = b"S\t\n.quit\n"
+        input = b"S\t;\n.quit\n"
         output = run_pty(script, input, env={"NO_COLOR": "1"})
         savepoint_idx = output.find(b"SAVEPOINT")
         select_idx = output.find(b"SELECT")