when use ollama that completion can't work about shell_gpt

[hdcola]

I check the code. When I use llama2:13b, the prompt can't get shell script. When I change to mistral:7b-instruct , Looks a little better.

But when I prompt sgpt -s "update brew and clean cache"

the answer is

```bash
brew update && brew cleanup
```

Hints that don't use Markdown don't work in ollama.