[docs] [issue15533] subprocess.Popen(cwd) documentation: Posix vs Windows

Damon Atkins damon.atkins@gmail.com added the comment:

From https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425.aspx

Note Python is using CreateProcess(), consider using CreateProcessW()

The Unicode version of this function, CreateProcessW, can modify the contents of this string. Therefore, this parameter cannot be a pointer to read-only memory (such as a const variable or a literal string). If this parameter is a constant string, the function may cause an access violation.

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