bug#55209: 29.0.50; Let easy-mmode--mode-docstring handle empty DOC

[daanturo]

>From 4f9bb869c736ffc10be6a83d33024247fd6f0573 Mon Sep 17 00:00:00 2001
From: Daanturo <daanturo@gmail.com>
Date: Mon, 2 May 2022 00:53:40 +0700
Subject: [PATCH] Allow empty docstrings for minor modes

* lisp/emacs-lisp/easy-mmode.el (easy-mmode--mode-docstring): handle
empty DOC case.
---
lisp/emacs-lisp/easy-mmode.el | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/emacs-lisp/easy-mmode.el b/lisp/emacs-lisp/easy-mmode.el
index 8a76eaf58c..4348efe363 100644
--- a/lisp/emacs-lisp/easy-mmode.el
+++ b/lisp/emacs-lisp/easy-mmode.el
@@ -106,7 +106,8 @@ it is disabled.")
;; Compose a new doc string.
(with-temp-buffer
(let ((lines (if doc
- (string-lines doc)
+ (or (string-lines doc)
+ '(""))
(list (format "Toggle %s on or off." mode-pretty-name)))))
;; Insert the first line from the doc string.
(insert (pop lines))
-- 
2.36.0

-- 
Daanturo.