After switch to concordance, diff on large objects sometimes does not show

[ldiqual]

Describe the bug

The following test fails as expected, but doesn't print the diff between actual & expected: https://gist.github.com/ldiqual/f874381a2e836fc57ca8c07be9f2f397
I believe this is due to https://github.com/vitest-dev/vitest/blob/main/packages/utils/src/diff.ts#L27-L28 which expects a specific color from the concordance output. However it sounds like concordance sometimes prints a 31m red plus, instead of a 32m green plus.

After inserting a bunch of console logs in @vitest/utils/diff.js, this is the raw output from concordance and the plus/minus that vitest expects:

Line:
"  +   contractSumToDatePreTax: 90909"

Raw:
"  \u001b[31m+\u001b[39m   contractSumToDatePreTax: \u001b[33m90909\u001b[39m\u001b[90m,\u001b[39m"

Plus:
"  \u001b[32m-\u001b[39m "

Minus:
"  \u001b[32m+\u001b[39m"

Reproduction

Run the following test: https://gist.github.com/ldiqual/f874381a2e836fc57ca8c07be9f2f397

System Info

System:
    OS: macOS 13.4
    CPU: (10) arm64 Apple M1 Pro
    Memory: 111.31 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 18.16.0 - ~/Library/Caches/fnm_multishells/27761_1686604561032/bin/node
    Yarn: 3.6.0 - ~/Library/Caches/fnm_multishells/27761_1686604561032/bin/yarn
    npm: 9.5.1 - ~/Library/Caches/fnm_multishells/27761_1686604561032/bin/npm
  Browsers:
    Chrome: 114.0.5735.106
    Firefox: 109.0
    Safari: 16.5
  npmPackages:
    @vitejs/plugin-react-swc: 3.3.2 => 3.3.2
    vite: 4.3.9 => 4.3.9
    vitest: 0.32.0 => 0.32.0

Used Package Manager

yarn

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.