[Adjust Rule] SIM908: odd transform for self-assign

[Skylion007]

Desired change

• Rule(s): SIM986, SIM987
• Adjustment: In which way should it/they be adjusted?

Explanation

• Invalid transformation for t

Example

This is an example where the mentioned rule(s) would currently be suboptimal:

        if "state_dict" in cpt:
            cpt = cpt["state_dict"]

        cpt = cpt.get("state_dict", cpt)

Is actually harder to read in this case.