Commit messages have a second line of ```

[brucestephens]

Issue

I'm using a local model which is producing OK one-line commit messages. But they always include a second line which is just ```. For example the first commit from a repository produced with uv init test with the prompt

/architect commit main.py

two commits are produced (for some reason, perhaps the model overthinking) the first message is

    feat: add main.py file
    ```

and the second one,

    fix: change greeting to casual tone
    ```

    Co-authored-by: aider (lm_studio/qwen3-coder-30b-a3b-instruct@q2_k_l) <aider@aider.chat>

Version and model info

Aider v0.86.1
Model: lm_studio/qwen3-coder-30b-a3b-instruct@q2_k_l