Vscode: Allow files.eol as language specific option

[ghost]

• VSCode Version: 1.18.1
• OS Version: Windows 10

Steps to Reproduce:

These are my current user settings

{
    "explorer.openEditors.visible": 0,
    "workbench.activityBar.visible": false,
    "editor.minimap.enabled": false,
    "editor.renderWhitespace": "all",
    "[php]": {
        "files.eol": "\n",
        "files.encoding": "utf8",
        "editor.tabSize": 4,
        "editor.insertSpaces": true,
        "files.insertFinalNewline": true,
        "files.trimFinalNewlines": true
    }
}

1. The setting "files.eol": "\n" isn't working. Every time I create or open a PHP file I want the line setting to be LF but Visual Code continues to put CRLF. Also I observe a strange error that I can't understand as we can observe on the image.
   

My conclusion is that the end of line option isn't working properly when using a specific language.

[joaomoreno]

This is JSON. You need to escape that backslash with another backslash:

"\\n"

[joaomoreno]

Actually I'm wrong... sending it to the right person.

[aeschli]

"files.eol" need to become a language scopable setting.

[bpasero]

Challenge is that when the model is being created, it just gets text/plain as mode because the actual mode is a promise that can load later. Thus, configuration that relies on the proper mode to be there will not be acknowledged initially.

[anthonyvdotbe]

This seems to be a duplicate of #34876

[aeschli]

Fixed by https://github.com/microsoft/vscode/pull/82101