Double escaping code in arrays

[cyberalien]

Describe the bug

When comparing arrays, \ is double escaped.

Example:

expect(['\\u123']).toEqual(['\\123'])

Results in:

    Array [
  -   "\\\\123",
  +   "\\\\u123",
    ]

Same bug doesn't happen when comparing strings:

expect('\\u123').toEqual('\\123');

Results in:

 - Expected   "\\123"
  + Received   "\\u123"

Reproduction

Test this:

expect(['\\u123']).toEqual(['\\123'])

StackBlitz demo: https://stackblitz.com/edit/vitest-dev-vitest-mym1aa?file=test/basic.test.ts

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 16.14.2 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 7.17.0 - /usr/local/bin/npm
  npmPackages:
    vite: latest => 3.2.4 
    vitest: latest => 0.25.3

Used Package Manager

npm

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