[iliaal]

Rationale

The normalization section described the empty-whitespace TAB exception twice after #25. Remove the older repetition, retaining the precise interior-tab example, default-whitespace comparison, edge-trimming guidance, and variation-selector explanation. Update the existing Unreleased documentation entry. No runtime code or test coverage changes.

Validation

• PHP 8.4.26: full PHPUnit suite passed, 1,388 tests / 4,012 assertions.
• PHPStan default and PHP 8.5 configurations: no errors.
• PHP-CS-Fixer dry run: no changes.
• Empty PHPStan baseline, PHP 8.5 deprecation guard, README punctuation guard, and git diff --check: passed.
• Independent review checked retained wording against normalization/tokenization code and existing TAB regressions.
• All upstream blob hashes and modes verified; final published tree matches the tested local tree. Clean merge-tree against the exact current default snapshot; no open sibling PRs before publication.

Limitations

Local validation used the available cloud fallback and retained dependencies/toolchain, not a connected desktop or saved coding environment. Local PHP 8.3/8.5 and fresh dependency audit were not run; CI separately passed all three PHP versions and dependency audits for the exact head. Workflow-security scanning is path-filtered and not applicable to these Markdown-only changes. No performance claim.

Exact-head CI

All five jobs in CI run 39799424509 completed successfully for e12d139ab873077f1e6a485d86beb603e4f3c7ee: PHP 8.3/8.4/8.5 each passed 1,388 tests and 4,012 assertions, plus static analysis and code style. No executed jobs were skipped. The workflow-level result also completed successfully at 15:45:50 UTC on October 22, 2026.