bug#47117: 28.0.50; [PATCH] Update docstring of 'tab-line-tabs-function'

[Gabriel <gabriel376@hotmail.com>]

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Juri Linkov <juri@linkov.net> writes:

>> The user option 'tab-line-tabs-function' on tab-line.el does not mention
>> the possible value of 'tab-line-tabs-buffer-groups', which can difficult
>> the discoverability of this feature for users. This patch update its
>> docstring to mention the missing option, and adds a docstring to the
>> function of same name. Feel free to modify the proposed patch for an
>> improved and clearer docstring version.
>
> Thanks for your patches.  There is only a very small problem:
>
>>  (defun tab-line-tabs-buffer-groups ()
>> +  "Return a list of buffers grouped either
>> +by `tab-line-tabs-buffer-group-function', when set,
>> +or by `tab-line-tabs-buffer-groups'."
>
> The first line of the docstring should be a complete sentence,
> as described in (info "(elisp) Function Documentation")

Here is an updated patch. I used 'tab-line-tabs-window-buffers' and
'tab-line-switch-cycling' as a reference. I appreciate your help, I am
still learning the basic stuff.


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From e32da7c2be28e03881d9d1d7fba0bec53d4f0c86 Mon Sep 17 00:00:00 2001
From: Gabriel do Nascimento Ribeiro <gabriel.nascimento@nubank.com.br>
Date: Sat, 13 Mar 2021 19:04:55 -0300
Subject: [PATCH] lisp/tab-line.el: Update docstring of
 'tab-line-tabs-function'

(tab-line-tabs-function): Mention'tab-line-tabs-buffer-groups'
in the docstring.
(tab-line-tabs-buffer-groups): Add docstring.
---
 lisp/tab-line.el | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lisp/tab-line.el b/lisp/tab-line.el
index 903862a3e8..76c04521d5 100644
--- a/lisp/tab-line.el
+++ b/lisp/tab-line.el
@@ -294,7 +294,10 @@ tab-line-tabs-function
 By default, use function `tab-line-tabs-window-buffers' that
 returns a list of buffers associated with the selected window.
 When `tab-line-tabs-mode-buffers', return a list of buffers
-with the same major mode as the current buffer."
+with the same major mode as the current buffer.
+When `tab-line-tabs-buffer-groups', return a list of buffers
+grouped either by `tab-line-tabs-buffer-group-function', when set,
+or by `tab-line-tabs-buffer-groups'."
   :type '(choice (const :tag "Window buffers"
                         tab-line-tabs-window-buffers)
                  (const :tag "Same mode buffers"
@@ -356,6 +359,11 @@ tab-line-tabs-buffer-group-name
           mode))))
 
 (defun tab-line-tabs-buffer-groups ()
+  "Return a list of tabs that should be displayed in the tab line.
+By default return a list of buffers grouped by major mode,
+according to `tab-line-tabs-buffer-groups'.
+If non nil, `tab-line-tabs-buffer-group-function' is used to
+generate the group name."
   (if (window-parameter nil 'tab-line-groups)
       (let* ((buffers (funcall tab-line-tabs-buffer-list-function))
              (groups
-- 
2.27.0