When clearing auto timetables, mark times as undefined rather than 0.

Fix unautomate timetable having reversed ctrl key behaviour,
update tooltip string with ctrl behaviour.
Minor comment/whitespace fixes.

src/command.cpp

@@ -352,7 +352,7 @@ static const Command _command_proc_table[] = {
 	DEF_CMD(CmdChangeTimetable,                                0, CMDT_ROUTE_MANAGEMENT      ), // CMD_CHANGE_TIMETABLE
 	DEF_CMD(CmdSetVehicleOnTime,                               0, CMDT_ROUTE_MANAGEMENT      ), // CMD_SET_VEHICLE_ON_TIME
 	DEF_CMD(CmdAutofillTimetable,                              0, CMDT_ROUTE_MANAGEMENT      ), // CMD_AUTOFILL_TIMETABLE
-	DEF_CMD(CmdAutomateTimetable,				   0, CMDT_ROUTE_MANAGEMENT	 ), // CMD_AUTOMATE_TIMETABLE]
+	DEF_CMD(CmdAutomateTimetable,                              0, CMDT_ROUTE_MANAGEMENT      ), // CMD_AUTOMATE_TIMETABLE
 	DEF_CMD(CmdSetTimetableStart,                              0, CMDT_ROUTE_MANAGEMENT      ), // CMD_SET_TIMETABLE_START
 
 	DEF_CMD(CmdOpenCloseAirport,                               0, CMDT_ROUTE_MANAGEMENT      ), // CMD_OPEN_CLOSE_AIRPORT

src/lang/english.txt

@@ -3944,7 +3944,7 @@ STR_TIMETABLE_AUTOFILL                                          :{BLACK}Autofill
 STR_TIMETABLE_AUTOFILL_TOOLTIP                                  :{BLACK}Fill the timetable automatically with the values from the next journey (Ctrl+Click to try to keep waiting times)
 
 STR_TIMETABLE_AUTOMATE                                          :{BLACK}Automate
-STR_TIMETABLE_AUTOMATE_TOOLTIP                                  :{BLACK}Manage the timetables automatically by updating the values for each journey
+STR_TIMETABLE_AUTOMATE_TOOLTIP                                  :{BLACK}Manage the timetables automatically by updating the values for each journey (Ctrl+Click when disabling to keep the current timetable)
 
 STR_TIMETABLE_EXPECTED                                          :{BLACK}Expected
 STR_TIMETABLE_SCHEDULED                                         :{BLACK}Scheduled

src/timetable_cmd.cpp

@@ -263,9 +263,9 @@ static int CDECL VehicleTimetableSorter(Vehicle * const *ap, Vehicle * const *bp
  * Set the start date of the timetable.
  * @param tile Not used.
  * @param flags Operation to perform.
- * @param p2 Various bitstuffed elements
- * - p2 = (bit 0-19) - Vehicle ID.
- * - p2 = (bit 20)   - Set to 1 to set timetable start for all vehicles sharing this order
+ * @param p1 Various bitstuffed elements
+ * - p1 = (bit 0-19) - Vehicle ID.
+ * - p1 = (bit 20)   - Set to 1 to set timetable start for all vehicles sharing this order
  * @param p2 The timetable start date.
  * @param text Not used.
  * @return The error or cost of the operation.
@@ -432,8 +432,8 @@ CommandCost CmdAutomateTimetable(TileIndex index, DoCommandFlag flags, uint32 p1
 					OrderList *orders = v2->orders.list;
 					if (orders != NULL) {
 						for (int i = 0; i < orders->GetNumOrders(); i++) {
-							ChangeTimetable(v2, i, 0, MTF_WAIT_TIME, true);
-							ChangeTimetable(v2, i, 0, MTF_TRAVEL_TIME, true);
+							ChangeTimetable(v2, i, 0, MTF_WAIT_TIME, false);
+							ChangeTimetable(v2, i, 0, MTF_TRAVEL_TIME, false);
 						}
 					}
 				}

src/timetable_gui.cpp

@@ -612,7 +612,7 @@ struct TimetableWindow : Window {
 			case WID_VT_AUTOMATE: {
 				uint32 p2 = 0;
 				if (!HasBit(v->vehicle_flags, VF_AUTOMATE_TIMETABLE)) SetBit(p2, 0);
-				if (!_ctrl_pressed) SetBit(p2, 1);
+				if (_ctrl_pressed) SetBit(p2, 1);
 				DoCommandP(0, v->index, p2, CMD_AUTOMATE_TIMETABLE | CMD_MSG(STR_ERROR_CAN_T_TIMETABLE_VEHICLE));
 				break;
 			}