[PATCH] Update more calls to add_prefix_cmd

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tom@tromey.com> writes:

Tom> I looked at all the calls to add_prefix_cmd, and replaced them with
Tom> calls to add_basic_prefix_cmd or add_show_prefix_cmd when appropriate.
Tom> This makes gdb's command language a bit more regular.  I don't think
Tom> there's a significant downside.

Tom> Note that this patch removes a couple of tests.  The removed ones are
Tom> completely redundant.

I'm checking this in.

Tom