test: data_explorer::format::tests::test_truncation failed on Japanese characters

I found the following test case failed in the ark crate while I'm trying to create a nix package for ark 0.1.220

    running 1 test
    test data_explorer::format::tests::test_truncation ... FAILED

    failures:

    failures:
        data_explorer::format::tests::test_truncation

    test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 402 filtered out; finished in 0.47s

  stderr ---

    thread 'data_explorer::format::tests::test_truncation' (9048) panicked at crates/ark/src/data_explorer/format.rs:776:13:
    assertion `left == right` failed
      left: [FormattedValue("<U+")]
     right: [FormattedValue("ボルテ")]
    note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

The test case resulting in this error are related to Japanese characters trimming as described here:

https://github.com/posit-dev/ark/blob/aba06d0a802815029cd24e52208bb91d808c6b36/crates/ark/src/data_explorer/format.rs#L774-L778

Cargo nextest argument:

--target x86_64-unknown-linux-gnu --offline -j 16 --cargo-profile release --

Package versions:

rustc 1.91.1 (ed61e7d7e 2025-11-07) (built from a source tarball)
cargo 1.91.0 (ea2d97820 2025-10-10)
cargo-nextest 0.9.114
release: 0.9.114

My system info:

OS: NixOS 26.05 (Yarara) x86_64
Host: 83E3 (Yoga Pro 7 14AHP9)
Kernel: Linux 6.12.60
CPU: AMD Ryzen 7 8845HS (16) @ 5.14 GHz
GPU 1: NVIDIA GeForce RTX 3050 6GB Laptop GPU [Discrete]
GPU 2: AMD Radeon 780M Graphics [Integrated]
Locale: en_US.UTF-8

Start with crates/ark/src/data_explorer/format.rs around the test_truncation test at lines 774-778. Reproduce the failure with the reported cargo nextest arguments and inspect the truncation behavior for Japanese characters. Done means the test passes with the expected Japanese output and existing truncation tests remain passing.