[PATCH] Add a note for how to get the list of threads

[Eli Zaretskii]

> Date: Tue, 22 Oct 2019 18:19:00 -0500
> From: "Christian Biesinger via gdb-patches" <gdb-patches@sourceware.org>
> Cc: Christian Biesinger <cbiesinger@google.com>
> 
> gdb/doc/ChangeLog:
> 
> 2019-10-22  Christian Biesinger  <cbiesinger@google.com>
> 
> 	* python.texi (Threads In Python): Add a note for how to get the
> 	list of threads.

This is okay, but...

> +To get the list of threads for an inferior, use the @code{Inferior.threads()}
> +method. @xref{Inferiors In Python}
         ^^
...two spaces between sentences, please.

Thanks.