fix escape and import

MergeKitPlus.ipynb

@@ -97,7 +97,7 @@
     "trust_remote_code = False # @param {type:\"boolean\"}\n",
     "clone_tensors = True # @param {type:\"boolean\"}\n",
     "low_ram = True # @param {type:\"boolean\"}\n",
-    "out_shard_size = "500M" # @param {type:\"string\"}\n",
+    "out_shard_size = \"500M\" # @param {type:\"string\"}\n",
     "\n",
     "# @markdown ### Extract LoRA (experimental)\n",
     "base_model = \"unsloth/Llama-3.2-3B-Instruct\" # @param {type:\"string\"}\n",
@@ -233,6 +233,7 @@
     "\n",
     "!pip install -qU huggingface_hub\n",
     "\n",
+    "import os\n"
     "import yaml\n",
     "\n",
     "from huggingface_hub import HfApi\n",