Update special_tokens_map.json

special_tokens_map.json

@@ -13,5 +13,11 @@
     "rstrip": false,
     "single_word": false
   },
-  "sep_token": "<|reward_token>|"
+  "sep_token": {
+    "content": "<|reward_token|>",
+    "lstrip": false,
+    "normalized": false,
+    "rstrip": false,
+    "single_word": false
+  }
 }