bug#64425: [PATCH] Mention minibuffer-next-completion in completion-help

[Spencer Baugh <sbaugh@janestreet.com>]

Eli Zaretskii <eliz@gnu.org> writes:
>> From: sbaugh@catern.com
>> Date: Sun, 02 Jul 2023 19:14:06 +0000 (UTC)
>> Cc: 64425@debbugs.gnu.org
>> 
>> > Isn't this text too long for a single screen line?  If so, it will
>> > cause an annoying "jumping" of the mode line.
>> 
>> Good point, how about this wording:
>
> OK, I think.
>
>> > Also, what about updating the documentation?
>> 
>> All the other relevant documentation that I know about has already been
>> updated to mention minibuffer-{next,previous,choose}-completion.
>
> I don't see the additional bindings documented anywhere.
> And neither can I find any reference to
> minibuffer-{next,previous,choose}-completion.  What did I miss?

(info "(emacs) Completion Commands") documents M-<DOWN>, M-<UP>,
M-<RET>.

How about this?

diff --git a/doc/emacs/mini.texi b/doc/emacs/mini.texi
index 9bf4da67644..517a6262522 100644
--- a/doc/emacs/mini.texi
+++ b/doc/emacs/mini.texi
@@ -393,7 +393,7 @@ Completion Commands
 @vindex minibuffer-completion-auto-choose
 @item M-@key{DOWN}
 @itemx M-@key{UP}
-While in the minibuffer, these keys navigate through the completions
+These keys navigate through the completions
 displayed in the completions buffer.  When
 @code{minibuffer-completion-auto-choose} is non-@code{nil} (which is
 the default), using these commands also inserts the current completion
@@ -410,7 +410,7 @@ Completion Commands
 @itemx @key{prior}
 Typing @kbd{M-v}, while in the minibuffer, selects the window showing
 the completion list (@code{switch-to-completions}).  This paves the
-way for using the commands below.  @key{PageUp}, @key{prior} and
+way for also using the commands below.  @key{PageUp}, @key{prior} and
 @kbd{M-g M-c} does the same.  You can also select the window in other
 ways (@pxref{Windows}).