TabCompletion console argument is ignored #1845

In ipy -? the TabCompletion option is shown:

-X TabCompletion: Enable TabCompletion mode

Looking at the source the TabCompletion option is only used in the Microsoft.Scripting.Hosting.Shell.ConsoleHost.CreateConsole to decide whether to run a basic or super console. Since IronPython is overriding the method in its own PythonConsoleHost, the option does nothing.

Off the top of my head, here are some ways we could handle this:

• Remove the option from the help listing at the IronPython level.
• Update the DLR to make the option obsolete (we could "promote" the BasicConsole option to the DLR).