DOC: Fix trailing whitespace and end-of-file issues (pre-commit CI)

Author: AnandMukherjee2004

doc/source/getting_started/intro_tutorials/11_brackets_vs_parenthesis.rst

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-.. _10min_tut_11_brackets_vs_parenthesis:\n\nParentheses vs. Square Brackets in Python and pandas\n====================================================\n\nIn both Python and pandas, it is important to understand the difference between parentheses ``()`` and square brackets ``[]``:\n\n- **Parentheses** are used to call functions and methods. For example, ``df.mean()`` calculates the mean of a DataFrame. Parentheses are also used to group expressions, such as ``(a + b) * c``, or to create tuples: ``(1, 2, 3)``.\n- **Square brackets** are used for indexing, selecting data, and defining lists. In pandas, you use square brackets to select columns or filter data—for instance, ``df['A']`` selects column ``A``, while ``df[0:3]`` selects rows by position. In standard Python, square brackets are also used to define a list, as in ``my_list = [1, 2, 3]``.\n\n\n**Remember :**\nUse ``[]`` for selection or indexing, and ``()`` for calling functions or grouping expressions.\n\nFor more explanation, see `Brackets in Python and pandas <https://python-public-policy.afeld.me/en/columbia/brackets.html>`__.\n
+.. _10min_tut_11_brackets_vs_parenthesis:
+
+Parentheses vs. Square Brackets in Python and pandas
+====================================================
+
+In both Python and pandas, it is important to understand the difference between parentheses ``()`` and square brackets ``[]``:
+
+- **Parentheses** are used to call functions and methods. For example, ``df.mean()`` calculates the mean of a DataFrame. Parentheses are also used to group expressions, such as ``(a + b) * c``, or to create tuples: ``(1, 2, 3)``.
+- **Square brackets** are used for indexing, selecting data, and defining lists. In pandas, you use square brackets to select columns or filter data—for instance, ``df['A']`` selects column ``A``, while ``df[0:3]`` selects rows by position. In standard Python, square brackets are also used to define a list, as in ``my_list = [1, 2, 3]``.
+
+Remember: Use ``[]`` for selection or indexing, and ``()`` for calling functions or grouping expressions.
+
+For more explanation, see `Brackets in Python and pandas <https://python-public-policy.afeld.me/en/columbia/brackets.html>`__.