chore: clean-up

[Planeshifter]

Description

What is the purpose of this pull request?

Follow-up fixes for commits merged to develop between 2026-08-06 08:33 (-0700) (37d7d9e) and 2026-08-07 04:52 (-0700) (9e08b03).

This pull request:

• stats/base/dists/arcsine/cdf: Fix typo 'retruns' -> 'returns' in the assertion messages left by 7b64d86's ULP-based test migration for stats/base/dists/arcsine/cdf; corrected in test/test.main.js:138 and test/test.native.js:109.
• tools/make/lib/tools-test-cov: docstring in tools/make/lib/tools-test-cov/c8.mk (introduced fbe844b) documents the internal FAIL_FAST flag; the user-facing environment variable — documented by the sibling test-cov/c8.mk and istanbul.mk docstrings — is FAST_FAIL (see tools/make/common.mk). Corrected the docstring. (An earlier commit on this branch wrongly "fixed" javascript.mk in the opposite direction; that change was reverted.)
• blas/ext/base/ztril: Fix blas/ext/base/ztril/test/test.js:26 — require( './../lib/' ) had a stray trailing slash, out of step with every other package test (see sibling ztriu); dropped it to match convention. Originated in 41d170f.
• assert/has-promise-support: In docs/repl.txt, commit 258e932 (assert/has-promise-support) left a stray trailing blank line after See Also, inconsistent with has-async-await-support, has-generator-support, and has-symbol-support; trimmed to match.

Related Issues

Does this pull request have any related issues?

No.

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

Validation. All 39 commits merged to develop in the 24-hour window were reviewed for typos, bugs, and stdlib style-guide violations. Checks performed: style-guide compliance of new packages (blas/ext/base/ztril, blas/ext/base/gtriu2tril, blas/ext/base/ndarray/{d,g,s}copy-within, stats/base/ndarray/dmeanli C add-on, assert/has-promise-support) against established sibling packages; a bug scan of the full union diff (C kernel loop bounds, napi argument marshalling, complex stride handling, memory allocation/free paths, ULP tolerance migrations, CI workflow guard logic). No runtime bugs were found; the migrated ULP-based test suites all pass.

Deliberately excluded (anything requiring interpretation): missing namespace TypeScript declarations / README TOC entries for the newly added packages (ztril, gtriu2tril, dcopyWithin/gcopyWithin/scopyWithin, hasPromiseSupport) — these land in separate follow-up commits per established repo practice (cf. 6545980 in this same window); and any subjective or judgment-call findings.

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 authored by Claude Code as part of an automated review of commits recently merged to develop. Claude reviewed the diffs, validated each finding against sibling packages and style guides, and applied the fixes; a human maintainer will audit before promoting from draft.

[kgryte]

This is wrong. The user-facing environment variable is FAST_FAIL. See

stdlib/tools/make/common.mk

Line 40 in 8500b0f

ifndef FAST_FAIL

.

[Planeshifter]

You're right — FAST_FAIL is the user-facing variable and FAIL_FAST is the derived internal flag, so the original docstring was correct. Thanks for reverting. The actual inconsistency was the other way around: the new tools-test-cov/c8.mk docstring documented FAIL_FAST, unlike test-cov/c8.mk and istanbul.mk which document FAST_FAIL. Fixed in a2f1fa0.

---

Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
assert/has-promise-support	$\\color{green}116/116$ $\\color{green}+100.00\\%$	$\\color{red}6/7$ $\\color{green}+85.71\\%$	$\\color{green}1/1$ $\\color{green}+100.00\\%$	$\\color{green}116/116$ $\\color{green}+100.00\\%$
blas/ext/base/ztril	$\\color{green}584/584$ $\\color{green}+100.00\\%$	$\\color{green}43/43$ $\\color{green}+100.00\\%$	$\\color{green}5/5$ $\\color{green}+100.00\\%$	$\\color{green}584/584$ $\\color{green}+100.00\\%$
stats/base/dists/arcsine/cdf	$\\color{green}317/317$ $\\color{green}+100.00\\%$	$\\color{green}27/27$ $\\color{green}+100.00\\%$	$\\color{green}4/4$ $\\color{green}+100.00\\%$	$\\color{green}317/317$ $\\color{green}+100.00\\%$

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