Single-item collections display as "1 items" instead of "1 item"

[anjiro]

Describe the bug

Input: [1]

Output:

[ 1 Items
  0: 1
]

It should say 1 Item instead.

Environment

{
"marimo": "0.9.10",
"OS": "Darwin",
"OS Version": "23.6.0",
"Processor": "arm",
"Python Version": "3.11.2",
"Binaries": {
"Browser": "129.0.6668.101",
"Node": "v22.9.0"
},
"Dependencies": {
"click": "8.1.3",
"importlib-resources": "missing",
"jedi": "0.18.2",
"markdown": "3.5.2",
"pygments": "2.14.0",
"pymdown-extensions": "10.7",
"ruff": "0.0.292",
"starlette": "0.36.1",
"tomlkit": "0.12.3",
"typing-extensions": "4.9.0",
"uvicorn": "0.27.0.post1",
"websockets": "12.0"
},
"Optional Dependencies": {
"pandas": "2.0.2",
"polars": "0.19.12"
}
}

Code to reproduce

No response

[mscolnick]

Looks like an issue with an upstream library: TexteaInc/json-viewer#531