Fix(tokenizer): Fix condition to add pad token (#477)

* Fix(tokenizer): Fix condition to add pad token

* chore: fix lint

src/axolotl/utils/models.py

@@ -55,10 +55,15 @@ def load_tokenizer(cfg):
         **tokenizer_kwargs,
     )
 
-    if tokenizer.__class__.__name__ in [
-        "LlamaTokenizer",
-        "LlamaTokenizerFast",
-    ] and not hasattr(tokenizer, "pad_token"):
+    if (
+        tokenizer.__class__.__name__
+        in [
+            "LlamaTokenizer",
+            "LlamaTokenizerFast",
+        ]
+        and hasattr(tokenizer, "pad_token")
+        and not tokenizer.pad_token
+    ):
         # set a pad_token, but use eos_token so we don't add a new token
         tokenizer.pad_token = LLAMA_DEFAULT_EOS_TOKEN