[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

docs/teacher_pupil.ipynb

@@ -128,7 +128,8 @@
     "@pf.register_dataframe_method\n",
     "def drop_duplicated_column(df, column_name: str, column_order: int = 0):\n",
     "    \"\"\"Remove duplicated columns and retain only a column given its order.\n",
-    "    Order 0 is to remove the first column, Order 1 is to remove the second column, and etc\"\"\"\n",
+    "    Order 0 is to remove the first column, Order 1 is to remove the second column, and etc\n",
+    "    \"\"\"\n",
     "\n",
     "    cols = list(df.columns)\n",
     "    col_indexes = [\n",