Fix CI failure from Clippy byte_char_slices lint

[Copilot]

A scheduled CI run started failing in the develop job after Clippy flagged a test byte array literal as byte_char_slices. The failure was isolated to a single test helper in StrBuf coverage.

• Problem

  • Clippy now rejects this test pattern under clippy::all:

    let raw_buf = [b'a', b'b', b'c'];

• Change

  • Replace the byte-by-byte array literal with the equivalent byte string literal dereference:

    let raw_buf = *b"abc";

• Scope

  • Test-only change in crates/const-str/src/__ctfe/str.rs
  • No behavioral change to library code or public API

[Copilot]

Pull request overview

Fixes a new Clippy byte_char_slices lint failure in the const-str crate’s CTFE StrBuf tests by switching a byte-by-byte array literal to an equivalent byte-string literal dereference.

Changes:

• Replace [b'a', b'b', b'c'] with *b"abc" in a StrBuf::new_unchecked test case to satisfy Clippy.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.86%. Comparing base (d03d206) to head (501498e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #63   +/-   ##
=======================================
  Coverage   94.86%   94.86%           
=======================================
  Files          37       37           
  Lines        3855     3855           
  Branches     3855     3855           
=======================================
  Hits         3657     3657           
  Misses        171      171           
  Partials       27       27           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.