Formatting bugs on gtk4 DrawingArea page

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Describe the bug
On the gtk4 page for the DrawingArea, there are formatting bugs, which expose the format specification of the documentation to the end user.

To Reproduce
Steps to reproduce the behavior:

1. go to https://valadoc.org/gtk4/Gtk.DrawingArea.html

Expected behavior
Codeblocks and images should be visible and signals should be colored and clickable.

Screenshots

Desktop (please complete the following information):

• OS: Linux (x86_64)
• Browser: Brave
• Version: 1.58.118 Chromium

Smartphone (please complete the following information):

• Device: not tested
• OS: not tested
• Browser not tested
• Version not tested

Additional context
none

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This issue persists