docs: add missing @throws annotation for c in random/iter/triangular

[Planeshifter]

Description

What is the purpose of this pull request?

This pull request adds a @throws annotation that was missing from random/iter/triangular relative to every other iterator factory in the random/iter namespace.

random/iter/triangular

The triangular iterator validates its c argument (the distribution mode) and throws a TypeError when c is not a number, yet the function JSDoc documented only the a and b argument throws. Every sibling random/iter package that validates positional arguments documents a @throws tag for each such argument (40/40 conformance among packages with positional parameters); triangular was the sole outlier. This change adds the single missing @throws {TypeError} tag for c in code order, between the b type-check and the a <= c <= b range-check annotations. Documentation only — no executable code, error messages, or test expectations change.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request?

Conformance: 40/40 (100%) of random/iter packages that validate positional arguments document one @throws tag per argument; triangular was the only package documenting fewer tags than it throws. The deviation was surfaced by an automated cross-package drift analysis of the namespace (structural + semantic feature extraction, majority vote at a 75% threshold, per-outlier validation) and confirmed against the package's source, tests, and examples. The fix is a single-line JSDoc addition confined to random/iter/triangular/lib/main.js.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

AI Assistance

When authoring the changes proposed in this PR, did you use any kind of AI assistance?

• Yes
• No

If you answered "yes" above, how did you use AI assistance?

• Code generation (e.g., when writing an implementation or fixing a bug)
• Test/benchmark generation
• Documentation (including examples)
• Research and understanding

Disclosure

This PR was produced by an automated cross-package drift-detection routine running in Claude Code. The routine extracted structural and semantic features from every package in the random/iter namespace, computed the majority documentation pattern, flagged the single deviating package, and validated the finding before applying a one-line JSDoc fix. A maintainer should review before promoting from draft.

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
random/iter/triangular	$\\color{green}310/310$ $\\color{green}+100.00\\%$	$\\color{green}43/43$ $\\color{green}+100.00\\%$	$\\color{green}10/10$ $\\color{green}+100.00\\%$	$\\color{green}310/310$ $\\color{green}+100.00\\%$

The above coverage report was generated for the changes in this PR.