Align CLI args and some smaller fixes (#167)

* Add `.DS_Store` files to `.gitignore`

* Fix variable naming of `config` in `mixtral/convert.py`

* Align CLI args and minor fixes

* standardize

* one more

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Co-authored-by: Awni Hannun <awni@apple.com>

llms/llama/convert.py

@@ -60,7 +60,7 @@ def llama(model_path):
 def tiny_llama(model_path):
     try:
         import transformers
-    except ImportError as e:
+    except ImportError:
         print("The transformers package must be installed for this model conversion:")
         print("pip install transformers")
         exit(0)