Non-enum CLI options with multiple values separated by comma and space aren't whitespace trimmed

[auvred]

🔎 Search Terms

CLI, compilerOptions, whitespace, comma

🕗 Version & Regression Information

Checked on the latest main

⏯ Playground Link

No response

💻 Code

> npx tsc --showConfig --customConditions "a, b" --types "a, b" --typeRoots "a, b" --moduleSuffixes "a, b" --excludeDirectories "a, b" --excludeFiles "a, b" --lib "es2015, dom" index.ts

🙁 Actual behavior

{
    "compilerOptions": {
        "customConditions": [
            "a",
            " b"
        ],
        "lib": [
            "es6",
            "dom"
        ],
        "moduleSuffixes": [
            "a",
            " b"
        ],
        "typeRoots": [
            "./a",
            "./ b"
        ],
        "types": [
            "a",
            " b"
        ]
    },
    "files": [
        "./index.ts"
    ]
}

See space before b in resolved config, and also note that lib values are trimmed correctly

🙂 Expected behavior

{
    "compilerOptions": {
        "customConditions": [
            "a",
            "b"
        ],
        "lib": [
            "es6",
            "dom"
        ],
        "moduleSuffixes": [
            "a",
            "b"
        ],
        "typeRoots": [
            "./a",
            "./b"
        ],
        "types": [
            "a",
            "b"
        ]
    },
    "files": [
        "./index.ts"
    ]
}

Non-enum options should be whitespace-trimmed as well

Additional information about the issue

Followup for #64522 (comment)