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

tgxworld · September 16, 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)

Topic		Replies	Views
Pasted content gains erroneous line breaks Bug needs-repro	5	310	August 19, 2024
Copy a `blockQuote` → paste it into `/new-topic`’s `text/plain` `textarea` → switch to the previewer → becomes `pre > code` Bug markdown	0	42	October 28, 2026
Fenced code blocks don't work with ~~~…~~~ Feature	6	1503	June 26, 2017
Changes to copy/paste? Pasting formatted text inserts markdown Product Support	2	1297	September 17, 2018
Coincidental Markdown in formatted content pasted to rich text editor rendered on publish Bug composer	0	176	October 27, 2025

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

Related topics