Auto-Indent on match and case

[cdce8p]

It would be helpful if the python extension would automatically indent the next line after writing

match .... :

and

    case .... :

This is somewhat similar to #8938 although I'm not sure if any additional work is required, since match and case are only soft keywords.

[brettcannon]

Thanks for bringing this to our attention! I've opened #16100 to track this (which I have filed as a bug).