bug in filebrowser: file-rename on copy/paste

[jhgoebbert]

Description

If you use the JupyterLab filebrowser to copy a file with the name test-Copy.file to a different directory with the context menu using "Copy" and "Paste" the file-copy will be renamed to test.file.

This can be reproduce it with arbitrary file names as long as there is the "-Copy" in the file name.

Reproduce

1. Create a file test-Copy.file with the JupyterLab filebrowser
2. Right-click on this file and select "Copy"
3. open any other directory in the JupyterLab filebrowser
4. right click and select "Paste"
5. the copyed file will have the name "test.file" instead of "test-Copy.file"

Expected behavior

the copied file will keep its filename which is test-Copy.file

Context

• Operating System and version: Windows 10
• Browser and version: Firefox 98.0.1
• JupyterLab version: 3.2.1 and 3.3.0

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