chore: minor clean-up

[Planeshifter]

Description

Follow-up fixes for commits merged to develop between 28917cf0 (2026-04-26 12:48 UTC) and 19216fd1 (2026-04-27 05:56 UTC). 20 first-parent commits in the window were audited by four parallel reviewers (two style, two bug); after dedup, re-verification, and maintainer review, three high-signal issues remain.

• Fix @example blocks in @stdlib/blas/ext/base/dcartesian-square (a023392): index.d.ts used backtick template literals in four require calls (lib/node_modules/@stdlib/blas/ext/base/dcartesian-square/docs/types/index.d.ts, lines 41, 69, 92, 101); replaced with single quotes per style guide.
• In d4191cc, etc/eslint/plugin/index.js (line 23) disables node/no-unpublished-require, but the plugin was migrated to eslint-plugin-n in 0dc62ae3, making the directive a no-op under the n/ prefix and tripping --report-unused-disable-directives; updated to n/no-unpublished-require.
• Also from d4191cc, the new etc/eslint/plugin/package.json was missing the canonical "directories": {} field, which update_directories adds and which Lint Changed Files enforces; inserted to clear the failing CI lint.

Related Issues

No.

Questions

No.

Other

Validation

Checked across the 20-commit window:

• Style-guide compliance against docs/style-guides/javascript and docs/style-guides/text, using sibling reference packages (dcusum, ddiff/sdiff, gscatter) as the gold standard.
• Static bug scan: stride/offset arithmetic, off-by-one bounds, copy-paste mistakes in JSDoc / signature pairs, and bench-refactor format(...) substitutions versus the original concatenations.
• Logic + security: row/column-major branches, edge-case handling (N <= 0, empty inputs), TypeScript declarations versus underlying packages.
• Reproduced the Lint Changed Files failure locally (update_directories etc/eslint/plugin) to identify the missing directories field in etc/eslint/plugin/package.json.

Deliberately excluded:

• Anything requiring interpretation or judgment (suggestions, "nice to haves", subjective style preferences).
• Anything requiring code outside the diff window to validate.
• Pre-existing node/... ESLint disable directives in files not touched by 0dc62ae3 — out of scope per the migration's incremental rollout.
• Repeated boilerplate across the new BLAS packages — intentional per stdlib's package template.

A local report (commit-review-2026-04-27.md, kept outside the working tree) records the full review, including findings dropped during filtering and on maintainer request.

Checklist

• Read, understood, and followed the contributing guidelines.

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 authored by Claude Code as part of an automated commit-review pass over the last 24 hours of develop. Four parallel reviewer agents flagged candidate issues; each surviving issue was independently re-verified against the diff before a fix was applied. Maintainer audit expected before promoting from draft.

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[kgryte]

@Planeshifter We should add a lint rule for this. Basically all strings should use single quotes. We already have a lint rule enabled for single quotes:

stdlib/etc/eslint/rules/style.js

Line 1844 in 8b687a9

rules[ 'quotes' ] = [ 'error', 'single', {

.

Maybe we are dependent on your recent PR adding linting for JSDoc example source code.