docs(ast): fix docs for AssignmentPattern in BindingPattern enum

[camc314]

follow on from #15925

[camc314]

• docs(ast): fix docs for AssignmentPattern in BindingPattern enum #17309 👈 (View in Graphite)
• main

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[camc314]

Merge activity

• Dec 23, 11:58 AM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Dec 23, 12:31 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Dec 23, 12:39 PM UTC: Merged by the Graphite merge queue.

[codspeed-hq]

CodSpeed Performance Report

Merging #17309 will not alter performance

_{Comparing c/12-23-fix_ast_correct_docs_for_assignmentpattern_in_bindingpattern_enum (63b29b2) with main (94a482b)¹}

Summary

✅ 42 untouched
⏩ 3 skipped²

Footnotes

1. No successful run was found on graphite-base/17309 (c1d3e1a) during the generation of this report, so main (94a482b) was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 3 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[Copilot]

Pull request overview

This PR fixes the documentation for the AssignmentPattern variant in the BindingPattern enum, as a follow-up to PR #15925 which refactored binding patterns. The documentation now correctly reflects that AssignmentPattern is not used in function parameters, as FormalParameter has its own initializer field for default values.

Key changes:

• Removed incorrect examples showing AssignmentPattern in function parameter contexts (e.g., function f(x = 1) {})
• Enhanced the "Invalid in" section with proper documentation links and clearer explanations
• Added explicit references to FormalParameter::initializer and clarified syntax error cases

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