test: migrate constants/float16/ln-ten to ULP-based assertions

[kgryte]

Resolves a part of #11352.

Description

What is the purpose of this pull request?

This pull request:

• migrates the test suite of @stdlib/constants/float16/ln-ten from relative tolerance testing to ULP difference testing.
• replaces the absf( v - FLOAT16_LN10 ) <= EPS * FLOAT16_LN10 tolerance comparison with isAlmostSameValue( v, FLOAT16_LN10, 0 ), using @stdlib/number/float16/base/assert/is-almost-same-value (the half-precision assertion utility, matching the idiom already used by sibling packages such as constants/float16/half-ln-two).
• rounds the computed lnf(10) value to half-precision via @stdlib/number/float64/base/to-float16 before comparison, so that the ULP difference is measured in half-precision units.
• removes the now unused @stdlib/math/base/special/absf and @stdlib/constants/float16/eps requires.

Final ULP constant: 0. Starting from a high bound and tightening, the measured maximum ULP difference between float64ToFloat16( lnf( 10.0 ) ) and the exported constant is 0 (both are bit-identical half-precision values), so 0 is the minimum required ULP value. The package test suite was run repeatedly at the final bound (including via the pre-push hook) and passed deterministically each time.

Only test/test.js is modified; there is no test/test.native.js for this package.

Related Issues

Does this pull request have any related issues?

This pull request has the following related issues:

• [RFC]: Migrate math/base/special packages from relative tolerance testing to ULP difference testing (tracking issue) #11352

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.

Note that the editorconfig-checker pre-commit step could not run in the authoring environment because its binary is fetched from a GitHub release that was unreachable. The changed file was instead verified manually against .editorconfig (LF line endings, UTF-8, tab indentation, no trailing whitespace, final newline). JavaScript linting with etc/eslint/.eslintrc.tests.js is clean.

Checklist

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• Read, understood, and followed the contributing guidelines.

AI Assistance

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Disclosure

If you answered "yes" to using AI assistance, please provide a short disclosure indicating how you used AI assistance. This helps reviewers determine how much scrutiny to apply when reviewing your contribution. Example disclosures: "This PR was written primarily by Claude Code." or "I consulted ChatGPT to understand the codebase, but the proposed changes were fully authored manually by myself.".

This PR was written primarily by Claude Code, which located the package, mirrored the conversion idiom from already-migrated sibling packages, measured the minimum ULP bound, and ran the tests and linters.

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https://claude.ai/code/session_01TtYau9K417VTv6oYzKnGzv

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Coverage Report

Package	Statements	Branches	Functions	Lines
constants/float16/ln-ten	$\\color{green}51/51$ $\\color{green}+100.00\\%$	$\\color{green}1/1$ $\\color{green}+100.00\\%$	$\\color{green}0/0$ $\\color{green}+100.00\\%$	$\\color{green}51/51$ $\\color{green}+100.00\\%$

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