markdown-hide-markup does not hide headers when markdown-fontify-whole-heading-line is enabled

[kuranari]

Expected Behavior

When markdown-hide-markup is enabled, markdown header symbols should be hidden, even when markdown-fontify-whole-heading-line is enabled.

Actual Behavior

When markdown-fontify-whole-heading-line is enabled, enabling markdown-hide-markup does not hide markdown header symbols (e.g., #, ##).

Steps to Reproduce

1. Place the following in /tmp/emacs/.emacs:

(setq custom-file "/dev/null")

(package-initialize)
(add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/"))

(package-install 'markdown-mode)

(setq markdown-fontify-whole-heading-line t)
(setq markdown-hide-markup t)

(custom-set-faces
 `(markdown-header-face-1 ((t (:background "#ff0000" :height 1.5 :extend t)))))

2. Place the following in /tmp/emacs/sample.md:

# Header

text 

3. HOME=/tmp/emacs emacs -Q --load /tmp/emacs/.emacs /tmp/emacs/sample.md

Backtrace

Software Versions

• Markdown Mode: 2.6-alpha
• Emacs: GNU Emacs 28.2
• OS: macOS Ventura 13.3.1 (a)