chore: fix broken links

[VolodymyrBg]

http://www.stack.nl/~dimitri/doxygen/manual/docblocks.html - broken
https://www.doxygen.nl/manual/docblocks.html - correct
http://en.cppreference.com/w/cpp/concept/Iterator - broken
https://en.cppreference.com/w/cpp/iterator.html - correct

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 1a35076c-063b-41fa-b84f-c9153cb1fe5f

📥 Commits

Reviewing files that changed from the base of the PR and between 55941fc and 725e64f.

📒 Files selected for processing (1)

• doc/developer-notes.md

✅ Files skipped from review due to trivial changes (1)

• doc/developer-notes.md

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Walkthrough

Updated two textual links: a Doxygen reference in doc/developer-notes.md was changed to a Markdown multi-line link pointing to https://www.doxygen.nl/manual/docblocks.html, and a cppreference URL in a comment in src/immer/detail/type_traits.hpp was corrected to https://en.cppreference.com/w/cpp/iterator.html.

Changes

Cohort / File(s)	Summary
Documentation doc/developer-notes.md	Replaced legacy Doxygen URL with a Markdown multi-line link labelled "the Doxygen docblocks reference" pointing to https://www.doxygen.nl/manual/docblocks.html.
Source comment src/immer/detail/type_traits.hpp	Updated a comment link for the iterator concept from http://en.cppreference.com/w/cpp/concept/Iterator to https://en.cppreference.com/w/cpp/iterator.html.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• chore: fix broken link #1742: Similar documentation fix—updates Doxygen reference URLs in doc/developer-notes.md.

Poem

🐰 I hopped through links both old and new,
Swapped http for https, a tiny chew,
Doxygen and cppref now gleam,
Docs tidy and links supreme,
A little rabbit clap—hop, review!

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The PR description provides a concise list of the broken links and their corrected versions, but it lacks the mandatory 'PR intention' section structure specified in the template.	Add a 'PR intention' section that explicitly describes what this PR does and what issue it solves, following the repository's description template structure.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'chore: fix broken links' directly and clearly describes the main purpose of the PR: fixing broken links in documentation and code comments.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@doc/developer-notes.md`:
- Around line 107-108: Replace the bare URL in the sentence "A full list of
comment syntaxes picked up by doxygen can be found at
https://www.doxygen.nl/manual/docblocks.html" with a markdown link (e.g., "A
full list of comment syntaxes picked up by doxygen can be found at [Doxygen
docblocks](https://www.doxygen.nl/manual/docblocks.html)") so the file no longer
violates MD034; update the doc string accordingly wherever that bare URL
appears.