Color bleeding issue when folding headings whose content ends with a code block

[jamescherti]

Expected Behavior

When folding headings, markdown-mode should display the folded heading without any color bleeding.

Actual Behavior

There is Color bleeding that occurs when folding headings whose content end with a code block. The text color of the code block bleeds into the folded heading, causing the right side of folded lines to appear in the incorrect background color.

(By the way, just in case it can help you: Org mode version used to have the same issue; however, they seem to have fixed it by allowing users to set org-fontify-whole-block-delimiter-line to nil. It tested org version 9.7.14 and there is no color bleeding when headings whose content end with a code block are folded)

Before folding headings:

Here is the behavior after folding headings:

Steps to Reproduce

1. Edit this markdown file:

# Heading 1
## Heading 2
Code:
```python
print("Hello world")
```
# Heading 1
```
code
code
code
code
code
```

2. Evaluate the expression:

(hide-sublevels 1)

(if your theme does not change the background color of markdown code blocks, try using ef-themes or tomorrow-night-deepblue-theme.el.)

Backtrace

None

Software Versions

• Markdown Mode: From Git on Thu Nov 7 12:49:39 2024 +0900 (6f59f72)
• Emacs: 30.0.92
• OS: Linux