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[next/Breaking Change] Make Markdown's newline handling nearly compatible with the behavior of browsers/CSS #16805

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[next/Breaking Change] Make Markdown's newline handling nearly compatible with the behavior of browsers/CSS #16805

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@tats-u tats-u commented Oct 29, 2024 •
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Description

A part of #15081
Fixes #14936
Blocked by #16816 (Merged)

Always convert \n between han (including Japanese kana) and non-han to a space and allow line breaking at a space between han and non-han again (banned by #16691)

I'll rebase this to next after next merges main one more time. next doesn't include the change by #16691 and this PR depends on it.

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  • I’ve added tests to confirm my change works.
  • (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
  • (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
  • I’ve read the contributing guidelines.

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@tats-u tats-u mentioned this pull request Oct 29, 2024
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@tats-u tats-u force-pushed the markdown-newline-handling branch from efda8c7 to 4376cfd Compare November 4, 2024 11:55
@tats-u tats-u force-pushed the markdown-newline-handling branch from 4376cfd to e8c10f3 Compare November 4, 2024 11:58
@tats-u tats-u changed the base branch from main to next January 16, 2026 03:38
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yarn add https://pkg.pr.new/prettier/prettier/@prettier/plugin-hermes@16805.tgz

yarn add https://pkg.pr.new/prettier/prettier/@prettier/plugin-oxc@16805.tgz

yarn add https://pkg.pr.new/prettier/prettier@16805.tgz

commit: 581651b

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@tats-u tats-u mentioned this pull request Jan 16, 2026
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tats-u commented Jan 16, 2026

Once I tidy up the changelog a bit more, it'll be done.

@tats-u tats-u changed the title [next/Breaking Change] Make Markdown's newline handling compatible with browsers' behavior [next/Breaking Change] Make Markdown's newline handling more compatible with the behavior of browsers/CSS Jan 17, 2026
@tats-u tats-u changed the title [next/Breaking Change] Make Markdown's newline handling more compatible with the behavior of browsers/CSS [next/Breaking Change] Make Markdown's newline handling nearly compatible with the behavior of browsers/CSS Jan 17, 2026
@tats-u tats-u marked this pull request as ready for review January 17, 2026 12:05
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[For v4+ / breaking change] Always treat newline between non-punctuation han/kana and alphanumeric as space when proseWrap is always

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