`~~~` does not prevent auto-manipulation of pasted content, which three backticks does

tgxworld · 16 בספטמבר,‏ 2026,‏ 2:06am

I had a look at this and it will be fixed in the following PR:

github.com/discourse/discourse

FIX: Preserve pasted text inside tilde code fences (#43711)

main ← tgxworld/fix-tilde-fence-paste

merged 02:13AM - 16 Sep 26 UTC

tgxworld

+38 -8

When someone pastes formatted text into a code block opened with three tildes (`…~~~`), the Markdown composer adds formatting markers such as `**` to the pasted text. The same paste into a code block opened with three backticks stays unchanged. This commit makes both kinds of code block preserve pasted text. Pasting formatted text outside a code block still converts it to Markdown as before. ### Reviewer notes #### Before this fix The composer incorrectly converts the HTML representation to Markdown, producing `prefix **bold**` inside the tilde-fenced code block. ![Before the fix, the Markdown composer contains prefix followed by bold formatting markers inside a tilde-fenced code block](https://github.com/user-attachments/assets/be9fe779-d2f6-4e67-af66-5de0f155f6e1) #### After this fix The composer uses the plain-text representation inside the code block, producing `prefix bold` without formatting markers. ![After the fix, the Markdown composer contains prefix followed by plain bold text inside a tilde-fenced code block](https://github.com/user-attachments/assets/fcfea879-ab19-4f94-805c-32778d77cc00)

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Pasted content gains erroneous line breaks Bug needs-repro	5	251	19 באוגוסט,‏ 2024
Fenced code blocks don't work with ~~~…~~~ Feature	6	1448	26 ביוני,‏ 2017
Changes to copy/paste? Pasting formatted text inserts markdown Support	2	1272	17 בספטמבר,‏ 2018
Coincidental Markdown in formatted content pasted to rich text editor rendered on publish Bug composer	0	137	27 באוקטובר,‏ 2025
`white-space` CSS property of clipboard data not respected when pasting in rich text editor Bug composer	12	577	16 בינואר,‏ 2026

`~~~` does not prevent auto-manipulation of pasted content, which three backticks does

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