Bumps [eslint](https://github.com/eslint/eslint) from 10.9.0 to 10.9.1.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Commits](eslint/eslint@v10.9.0...v10.9.1)

---
updated-dependencies:
- dependency-name: eslint
  dependency-version: 10.9.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [markdown-it](https://github.com/markdown-it/markdown-it) from 15.0.0 to 15.0.1.
- [Changelog](https://github.com/markdown-it/markdown-it/blob/master/CHANGELOG.md)
- [Commits](markdown-it/markdown-it@15.0.0...15.0.1)

---
updated-dependencies:
- dependency-name: markdown-it
  dependency-version: 15.0.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Bumps [@humanfs/node](https://github.com/humanwhocodes/humanfs/tree/HEAD/packages/node) from 0.16.6 to 0.16.8.
- [Release notes](https://github.com/humanwhocodes/humanfs/releases)
- [Changelog](https://github.com/humanwhocodes/humanfs/blob/main/packages/node/CHANGELOG.md)
- [Commits](https://github.com/humanwhocodes/humanfs/commits/node-v0.16.8/packages/node)

---
updated-dependencies:
- dependency-name: "@humanfs/node"
  dependency-version: 0.16.8
  dependency-type: indirect
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* fix: do not add a newline to an empty code block

Renderer.code appended a newline unconditionally, so a code block with no
content rendered as <pre><code>\n</code></pre> instead of
<pre><code></code></pre>.

This fixes CommonMark examples 126, 130, 144 and 237. The spec suite did not
catch it because htmlIsEqual leaves html-differ's ignoreWhitespaces at its
default of true, and whitespace inside pre/code is significant, so all four
were already reported as passing.

* test: move the empty code block tests to test/specs/new

Uses renderExact so the fixture compares exactly, which htmlIsEqual
does not, and keeps the assertions out of marked.test.js.

CommonMark 0.31.2 says the optional closing sequence of #s must be
preceded by spaces or tabs, but the heading tokenizer tested for a
space only, so `# foo<tab>#` kept the trailing hashes as content.

The shared endingSpaceChar rule stays space only because code spans
need exactly that, so the heading path gets its own rule.

Bumps [eslint](https://github.com/eslint/eslint) from 10.9.1 to 10.10.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Commits](eslint/eslint@v10.9.1...v10.10.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-version: 10.10.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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## [18.0.12](v18.0.11...v18.0.12) (2026-09-07)

### Bug Fixes

* allow a tab before the closing sequence of an ATX heading ([#4084](#4084)) ([4417582](4417582))
* allow one more level of nested brackets in a link label ([#4064](#4064)) ([37b28d8](37b28d8))
* do not add a newline to an empty code block ([#4073](#4073)) ([23b1706](23b1706))
* escape character references in autolink destinations ([#4053](#4053)) ([8f432f0](8f432f0))
* reject GFM email autolink when the domain ends in _ or - ([#4063](#4063)) ([df57534](df57534))
* reject invalid characters in HTML tag names ([#4083](#4083)) ([300bb1d](300bb1d))
* remove up to the fence indentation from each content line ([#4074](#4074)) ([0244f08](0244f08))