Add a way to invoke redefined (overridden) GDB commands

[Pedro Alves]

On 10/19/20 7:47 PM, Philippe Waroquiers wrote:
> On Mon, 2020-10-19 at 19:05 +0100, Pedro Alves wrote:

> For what concerns the rename, alias uses = to separate
> the 2 commands:
>   (gdb) h alias
>   Define a new command that is an alias of an existing command.
>   Usage: alias [-a] [--] ALIAS = COMMAND [DEFAULT-ARGS...]
>   ...
> So, maybe better/more consistent to use = similarly for rename.

In the "alias" case, the "=" makes sense since we're
setting up an equivalence.

With renaming, isn't "=" a little weird?

 (gdb) rename oldname = newname

I guess I'd get used to it.