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Regression in v3.9.7 #20083

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@fisker

I forgot to run a regression test before release, turns out the v3.9.7 version cause lots of changes on MDN repo.

Diff prettier/prettier-regression-testing#731 (comment)

@seiyab I think it's caused by #19838, do you have time to look into it?

Prettier v3.9.7
Playground link

--parser markdown

Input:

**ASCII** (_American Standard Code for Information Interchange_) is a {{glossary("character encoding")}} standard using 7-bit to represent 128
{{glossary("character", "characters")}} used by computers and other devices for encoding letters, numbers, punctuation, and control codes into digital form.


**ASCII** (_American Standard Code for Information Interchange_) is a {{glossary("character encoding")}} standard using 7-bit to represent 128
a {{glossary("character", "characters")}} used by computers and other devices for encoding letters, numbers, punctuation, and control codes into digital form.

Output:

**ASCII** (_American Standard Code for Information Interchange_) is a {{glossary("character encoding")}} standard using 7-bit to represent 128

{{glossary("character", "characters")}} used by computers and other devices for encoding letters, numbers, punctuation, and control codes into digital form.

**ASCII** (_American Standard Code for Information Interchange_) is a {{glossary("character encoding")}} standard using 7-bit to represent 128
a {{glossary("character", "characters")}} used by computers and other devices for encoding letters, numbers, punctuation, and control codes into digital form.

Expected output:

**ASCII** (_American Standard Code for Information Interchange_) is a {{glossary("character encoding")}} standard using 7-bit to represent 128
{{glossary("character", "characters")}} used by computers and other devices for encoding letters, numbers, punctuation, and control codes into digital form.


**ASCII** (_American Standard Code for Information Interchange_) is a {{glossary("character encoding")}} standard using 7-bit to represent 128
a {{glossary("character", "characters")}} used by computers and other devices for encoding letters, numbers, punctuation, and control codes into digital form.

Why?

Activity

  1. added theissue type on Sep 16, 2026
  2. added
    help wantedWe're a small group who can't get to every issue promptly. We’d appreciate help fixing this issue!
    on Sep 16, 2026
  3. pinned this issue on Sep 16, 2026
  4. unpinned this issue on Sep 18, 2026
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    help wantedWe're a small group who can't get to every issue promptly. We’d appreciate help fixing this issue!lang:markdownIssues affecting Markdown

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