take real part to avoid warnings in notebook 2.

ketch · ketch · commit bdabe3f75007 · 2023-03-08T09:01:50.000+03:00
diff --git a/PSPython_02-pseudospectral-collocation.ipynb b/PSPython_02-pseudospectral-collocation.ipynb
@@ -542,7 +542,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3",
+   "display_name": "Python 3 (ipykernel)",
    "language": "python",
    "name": "python3"
   },
