Description

On Find and Replace, using Regular Expressions, using Replace All,
reference groups are NOT handled correctly.

Reproduce

1. Create a Jupyter notebook.
2. Type in the first cell:

{
    'var1': 123,
    'var2': 456,
}

3. Open the Find and Replace dialog.
4. Roll out the Replace part.
5. Click the Use Regular Expressions button.
6. Type: : (\d+), at the Find input.
7. Type: : $1+1, at the Replace input.
8. Click the Replace All button.
9. Expected cell content:

{
    'var1': 123+1,
    'var2': 456+1,
}

10. Actual cell content:

{
    'var1': $1+1,
    'var2': $1+1,
}

At the same time, the Replace-button single replaces work as expected.

Expected behavior

On Find and Replace, using Regular Expressions, using Replace All,
reference groups are handled correctly.

Context

• Operating System and version: Calculate Linux (Gentoo-based)
• Browser and version: Chromium 129.0.6668.100, 64 bit
• Jupyter Notebook version: 7.2.2