another indentation case

I adjusted the js tests a little more, fixing one comment I had indented wrong in js-args (similar to the comment tests of the last pull request), and added a new test (in js-args) for indentation of expressions split across lines.  In the last case, sorry, I had not written a Jane Street test for this case before, and it may be an interesting one to handle.

I added a provisional change to type indentation for Jane Street, and regression tests, for which i_type worked great.

I've also added a clarification to another indentation case in js-args, changing the preferred indentation of an argument in a nested function call.