Composite Extract Method issues when extracting a block with assignment

Pharo13 confirmed, didn't test in Pharo14.

Selecting block with `[ attrValue := attrName ]`, will yield these results:

<img width="1057" height="484" alt="Image" src="https://github.com/user-attachments/assets/8b7a452e-fa9e-4efd-97f1-70549f2a1e2f" />

<img width="1057" height="484" alt="Image" src="https://github.com/user-attachments/assets/337f1fbd-6e2c-4246-a27a-91a306feed98" />