• VSCode Version: 1.23.1
• OS Version: Windows 10 Pro x64

When you use .env file in the VS Code project and CMD.exe as terminal ("terminal.integrated.shell.windows": "cmd.exe") then for settings environment variables generated commands such as cmd /C "set "SECRET_KEY=uh_p8w$eo6%%tf5)d43b2y))88qxf2t9-s=osvq46u#3ya^p+" without escaping special symbols. Special symbols (such as & and ^) in the values of environment variables from the .env file in the set command should be escaped with the ^ symbol.

Steps to Reproduce:

1. Create .env file with the following content SECRET_KEY=uh_p8w$eo6%%tf5)d43b2y))88qxf2&t9-s=osvq46u#3ya^p+
2. Create some .py file
3. Create launch configuration for Python and ensure "envFile": "${workspaceFolder}/.env" in it (.env file used by default, so may be adding this line is not necessary)
4. Start debugging

In the Terminal the following error appears:

>cd c:\Users\info_000\Desktop && cmd /C "set "SECRET_KEY=uh_p8w$eo6%%tf5)d43b2y))88qxf2&t9-s=osvq46u#3ya^p+" && set "PYTHONIOENCODING=UTF-8" && set "PYTHONUNBUFFERED=1" && python ...\.vscode\extensions\ms-python.python-2018.4.0\pythonFiles\PythonTools\visualstudio_py_launcher.py ...\Desktop 52380 34806ad9-833a-4524-8cd6-18ca4aa74f14 RedirectOutput,RedirectOutput ...\Desktop\.vscode\launch.json "
't9-s' is not recognized as an internal or external command,
operable program or batch file.

Does this issue occur when all extensions are disabled?: Yes