More tweaks to dectalk driver. Think we're nearly there. Hopefully.

tests/unit/test_hardware_speech_drivers.py

@@ -70,6 +70,18 @@ def test_dectalk_driver_speaks_printable_text(serial_pair):
         speech_driver.shutdown()
 
 
+def test_dectalk_driver_neutralizes_inline_commands_in_speech(
+    serial_pair,
+):
+    speech_driver, master_fd = initialized_driver(dectalkDriver, serial_pair)
+    try:
+        speech_driver.speak("status [:dv g5 10] done")
+        expected = b"status [ :dv g5 10] done\x0b"
+        assert read_available(master_fd, len(expected)) == expected
+    finally:
+        speech_driver.shutdown()
+
+
 def test_dectalk_driver_writes_settings_and_cancel(serial_pair):
     speech_driver, master_fd = initialized_driver(dectalkDriver, serial_pair)
     try: