refactor: use format for error construction in stats/incr/pcorrmat

[Planeshifter]

Description

This pull request:

• Normalizes a stray plain-string-concatenation error throw in @stdlib/stats/incr/pcorrmat to use the format helper from @stdlib/string/format, matching the canonical pattern already used by every other throw in the same file and by sibling matrix packages (covmat, pcorrdistmat). Behavior is unchanged; the same Error is thrown with the same fields substituted into the message.

Questions

No.

Other

@stdlib/stats/incr/pcorrmat

lib/main.js:299 constructed its error message with '…' + order + '…' + numel(...) + '…'. The surrounding code already requires @stdlib/string/format and uses it in every other throw in the file (six of seven before this change). The analogous "means length must match matrix dimensions" throw in covmat/lib/main.js:228 and pcorrdistmat/lib/main.js both use format( '… Expected: \%u`. Actual: `%u`.', order, numel( means.shape ) )— 100% conformance among throw-bearing matrix packages instats/incr`. Rewrite mirrors that pattern verbatim; substituted values are now backtick-wrapped to match. Tests assert on error type only, not message text, and no examples trigger this path.

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 with assistance from Claude Code, which ran a cross-package API drift detection routine over the stats/incr namespace. The routine performed structural and semantic feature extraction across all 108 member packages, identified pcorrmat/lib/main.js:299 as the sole outlier on error-construction conformance (98% of throw-bearing siblings use format exclusively), and proposed the one-line fix after passing two-agent validation (semantic-review confirmed the deviation was unintentional; cross-reference confirmed no test or example relies on the exact message text).

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@stdlib-js/reviewers

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Generated by Claude Code

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
stats/incr/pcorrmat	$\color{green}545/545$ $\color{green}+100.00%$	$\color{green}47/47$ $\color{green}+100.00%$	$\color{green}6/6$ $\color{green}+100.00%$	$\color{green}545/545$ $\color{green}+100.00%$

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