Bump mistune from 3.3.3 to 3.3.4

[dependabot]

Bumps mistune from 3.3.3 to 3.3.4.

Release notes

Sourced from mistune's releases.

v3.3.4

   🐞 Bug Fixes

• Improve parsing for edge cases  -  by @​lepture (53412)
• Improve inline parser by learning from wenmode  -  by @​lepture (37bb7)
• Prevent deep alt parsing  -  by @​lepture (b77ee)
• def_list: A tab after the ':' marker no longer makes the definition a code block  -  by @​chuenchen309 and Claude Opus 4.8 (7aa49)
• table: Reject a non-delimiter second row instead of eating it  -  by @​chuenchen309 and Claude Opus 4.8 (86f9f)

   🏎 Performance

• Optimize inline edge-case parsing  -  by @​lepture (b4dd3)

    View changes on GitHub

Changelog

Sourced from mistune's changelog.

Version 3.3.4

Released on Jul 22, 2026

• Harden inline parsing against deeply nested and adversarial link, image, emphasis, formatting, math, and reference inputs.
• Improve performance for repeated link suffixes, dense emphasis, unclosed formatting markers, inline spoilers, and adjacent ruby tokens.
• Refactor the inline parser into dedicated emphasis and link modules.
• Escape literal */_ emphasis markers in the Markdown renderer so round-tripping escaped text does not re-introduce emphasis.

Commits

• 69ec2b8 chore: release 3.3.4
• 234aa25 test: more deadline for pypy
• b77ee58 fix: prevent deep alt parsing
• 66b2171 refactor: expose entity boundary helper
• 30ef44b refactor: move link token construction
• 3066209 refactor: require explicit emphasis depth
• 0396492 refactor: split inline parser modules
• 80b3e85 refactor: isolate inline parser state bounds
• 7b0194c test: cover inline performance edge cases
• b4dd328 perf: optimize inline edge-case parsing
• Additional commits viewable in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.11%. Comparing base (c19cba5) to head (a71270c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8330   +/-   ##
=======================================
  Coverage   71.11%   71.11%           
=======================================
  Files         305      305           
  Lines       32004    32004           
=======================================
  Hits        22760    22760           
  Misses       9244     9244           

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