[PATCH 2/5] Add a new 'info proc files' subcommand of 'info proc'.

[Eli Zaretskii]

> From: John Baldwin <jhb@FreeBSD.org>
> Date: Fri,  7 Sep 2018 17:36:56 -0700
> 
> This command displays a list of open file descriptors.

Thanks.

> +  add_cmd ("files", class_info, info_proc_cmd_files, _("\
> +List of open files."),

IMO, this doc strings is too terse.  I suggest to expand it telling
that the command shows the files open by the process being debugged.