Latest VS Code terminal settings for Windows Command Prompt cause "Start REPL" to fail #16169

Environment data

• VS Code version: 1.56.0
• Extension version (available under the Extensions sidebar): 2021.4.765268190
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): 3.9.5
• Type of virtual environment used (N/A | venv | virtualenv | conda | ...): N/A
• Relevant/affected Python packages and their versions: N/A
• Relevant/affected Python-related VS Code extensions and their versions: N/A
• Value of the python.languageServer setting: Pylance

[NOTE: If you suspect that your issue is related to the Microsoft Python Language Server (python.languageServer: 'Microsoft'), please download our new language server Pylance from the VS Code marketplace to see if that fixes your issue]

Expected behaviour

The REPL starts.

Actual behaviour

The REPL fails to start because PowerShell syntax is used ("& D:/Python/Python39/python.exe"), and Command Prompt doesn't understand this (error message: "& was unexpected at this time.").

Steps to reproduce:

[NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue]

1. Use VS Code's new terminal settings to make Command Prompt the default terminal:

    "terminal.integrated.profiles.windows": {
        "Command Prompt": {
            "path": [
                "${env:windir}\\Sysnative\\cmd.exe",
                "${env:windir}\\System32\\cmd.exe"
            ],
            "args": [],
            "icon": "terminal-cmd"
        },
        "PowerShell": {
            "source": "PowerShell",
            "icon": "terminal-powershell"
        },
    },
    "terminal.integrated.defaultProfile.windows": "Command Prompt",

2. Use the "Python: Start REPL" command (or the "Python: Run Selection/Line In Terminal" command) to start python in a terminal.

The problem does not occur if PowerShell is selected as the default terminal, or if the now deprecated terminal setting is used to select Command Prompt ("terminal.integrated.shell.windows": "${env:windir}\\Sysnative\\cmd.exe").

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