Extract variable inserts duplicate variable name

[bschnurr]

Describe the bug
[A clear and concise description of the bug]

Steps to Reproduce

1. select the code 'print(1 + 2 + 3)'
2. choose the code action 'extract vairable'
3. notice new it inserts 'new_varnew_var ='

Expected behavior
[A clear and concise description of your expectation]

Additional context and screenshots
[Add any other information such as screenshots, error message, or stack trace]

Sample Code

print(1 + 2 + 3)

Configuration information (If you are providing a diagnostics file (see below), skip this section)
VS Version: [Can be found under "Help->About Microsoft Visual Studio"]
PTVS version: [Can be found under "Help->About Microsoft Visual Studio->Installed products->Python with Pylance"]
Python version:
Debugger Type (if applicable): [New debugger or legacy debugger?]

Diagnostics file
The diagnostics file contains information such as the Python version, environments, loaded assemblies, configuration options, etc. This file makes it easier for us to reproduce and fix bugs, so we would really appreciate it if you could provide it to us. To locate the logs, you can can follow these steps:

1. Open the File Explorer on your computer.
2. In the address bar at the top of the window, type %TEMP% and press Enter.
3. The %TEMP% folder should open, look for file named PythonToolsDiagnostics_*.log, where * represents a series of numbers.

This file contain the diagnostic information that can help us diagnose and resolve the issue you're experiencing.
Please note that the %TEMP% folder is a hidden system folder, so you may need to enable the display of hidden files and folders in File Explorer to see it. To do this, click on the "View" tab in File Explorer, then check the "Hidden items" box in the "Show/hide" section.
You can attach the file to this issue or email it to us at [email protected]. If you email it, please add a link to this issue.

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[StellaHuang95]

It's by design that it inserted the variable name twice. The issue here is that the variable name is inserted at the wrong location.