fix collections cell bug

Author: fedorov

API/notebooks/How_to_use_IDC_APIs.ipynb

@@ -356,7 +356,7 @@
         "id": "AsmNpqYtyxl0"
       },
       "source": [
-        "collections_req = requests.get('{}/collections'.format(idc_api_preamble))\n",
+        "response = requests.get('{}/collections'.format(idc_api_preamble))\n",
         "# Check that there wasn't an error with the request\n",
         "if response.status_code != 200:\n",
         "    # Print the error code and message if something went wrong\n",
@@ -372,7 +372,7 @@
       },
       "source": [
         "# Print the collections JSON text\n",
-        "pretty(collections_req)"
+        "pretty(response)"
       ],
       "execution_count": null,
       "outputs": []