docs: fix default value documentation

[Planeshifter]

Description

What is the purpose of this pull request?

Follow-up fixes for commits merged to develop between 2026-08-15T05:33:22-07:00 (ee85255c) and 2026-08-16T02:40:52-07:00 (066149c2).

This pull request:

• blas/ext/base/ndarray/gdiff: Fix @returns annotation in gdiff main.js (line 48) to match ndarray family: 1004397 tagged it {Object} while sdiff/cdiff/zdiff/ddiff all use {ndarray}; changed to @returns {ndarray} output ndarray for consistency in lib/node_modules/@stdlib/blas/ext/base/ndarray/gdiff/lib/main.js.
• stats/base/ndarray/dnanmin: Fix NaN → 0.0/0.0 in lib/node_modules/@stdlib/stats/base/ndarray/dnanmin/README.md (L144); NaN isn't a valid C identifier, so the example doesn't compile. Introduced in 0222395; examples/c/example.c and the snanmin README already use the correct form.
• blas/ext/copy-within: Fixes stale documentation of the default source end index in blas/ext/copy-within: lib/main.js defaults end to N (elements along options.dim), but README.md (L57) and docs/repl.txt (L34–35), introduced in 8dc4cd2, both state N + 1, which is out-of-bounds and only harmless because of clamping. Corrects both docs to N.

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 36 commits merged to develop in the review window were checked for style-guide compliance (against docs/style-guides and established sibling packages) and scanned for bugs by multiple independent review passes. Checked and found clean: wrapper glue and argument order in the new blas/ext/base/ndarray diff/cunone/last-index-of-truthy families, JS/C coefficient and branch parity for math/base/special/erfinvf/erfcinvf (all 178 rational coefficients round-trip to identical float32 values; Julia fixtures pass within declared ULP tolerances), blas/ext/logspace argument normalization against its linspace template, blas/ext/copy-within semantics against Array.prototype.copyWithin, dnanmin/snanmin addon signatures and dtypes, the no-empty-lines-between-requires lint-rule fix, and the ULP test migrations. Deliberately excluded: anything requiring interpretation or judgment (e.g. mixed NaN vs 0.0/0.0 precedent in older READMEs, named-constant vs inlined-literal styles), and anything that would require changes outside the window's diff.

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 a scheduled automated review of the last 24 hours of commits merged to develop; each fix was independently re-verified against the repository before being applied.

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
blas/ext/copy-within	$\\color{green}534/534$ $\\color{green}+0.00\\%$	$\\color{green}51/51$ $\\color{green}+0.00\\%$	$\\color{green}5/5$ $\\color{green}+0.00\\%$	$\\color{green}534/534$ $\\color{green}+0.00\\%$
stats/base/ndarray/dnanmin	$\\color{green}176/176$ $\\color{green}+0.00\\%$	$\\color{green}7/7$ $\\color{green}+0.00\\%$	$\\color{green}2/2$ $\\color{green}+0.00\\%$	$\\color{green}176/176$ $\\color{green}+0.00\\%$

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