Add pad token to tokenizer (#9)

- Add pad token to tokenizer (b65535b77510c75f78fc9da67610a7374dc9c1ec)


Co-authored-by: Sanchit Gandhi <sanchit-gandhi@users.noreply.huggingface.co>

special_tokens_map.json

@@ -122,6 +122,7 @@
     "rstrip": false,
     "single_word": false
   },
+  "pad_token": "<|endoftext|>",
   "unk_token": {
     "content": "",
     "lstrip": false,