Ignore inline notes during Markdown reference parsing

[skatkov]

Inline notes inside reference labels can be parsed during the reference-gathering pass, before footnote ordering is initialized.

RDoc::Markdown.parse("[foo ^[note]]: /url\n")

This will crash a Markdown parser with a NoMethodError.

This change treats inline-note creation as a no-op until note ordering exists.

[Copilot]

Pull request overview

Resets @footnotes and @note_order to nil at the start of each parse call, and makes the InlineNote rule raise a ParseError when invoked before notes are initialized (e.g., during the references-gathering pass on a reused parser instance).

Changes:

• Reset @footnotes and @note_order to nil at the start of parse to prevent leakage across reused parser instances.
• Update the InlineNote PEG rule action to raise ParseError, 'invalid inline note' when @note_order is nil.
• Add a regression test exercising an inline note inside a reference label after a prior parse.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
lib/rdoc/markdown.kpeg	Source grammar: clear note state on parse and guard InlineNote action.
lib/rdoc/markdown.rb	Generated parser mirroring the kpeg changes (state reset + guard + Rules entry).
test/rdoc/rdoc_markdown_test.rb	New test validating the ParseError is raised on inline notes within reference labels after reuse.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.