fix output_folder creation in IEC notebook

Author: martin-springer

tutorials_and_tools/tutorials_and_tools/Tools - Module Standoff for IEC TS 63126.ipynb

@@ -493,11 +493,11 @@
     "\n",
     "output_folder = os.path.join(os.path.dirname(os.path.dirname(os.getcwd())), 'TEMP', 'results')\n",
     "try:\n",
-    "    os.mkdir(output_folder)\n",
+    "    os.makedirs(output_folder)\n",
     "except OSError as error:\n",
     "    print(error)\n",
     "\n",
-    "plt.savefig(output_folder+'\\Standoff_Scan.png', bbox_inches='tight')  #Creates an image file of the standoff plot\n",
+    "plt.savefig(os.path.join(output_folder, 'Standoff_Scan.png'), bbox_inches='tight')  #Creates an image file of the standoff plot\n",
     "plt.show()"
    ]
   },