Wikitextparser

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- Fixed a bug in ``Tag.parsed_contents``. (19)

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- Fixed a rarely occurring bug in detecting parameters with names consisting only of whitespace or underscores.

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- Fixed a bug in detecting parser functions containing parameters.

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- Fixed a bug in detecting table header cells that start with +, -, or }. (17)

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- Define deleter method for ``WikiText.string`` property and add ``Template.del_arg`` method. (14)
- Improve the ``lists`` method of ``Template`` and ``ParserFunction`` classes. (15)
- Fixed a bug in detection of multiline arguments. (13)
- Deprecated ``capital_links`` parameter of ``Template.normal_name``. Use
``capitalize`` instead (keyword-only argument).
- Deprecated the ``code`` parameter of ``Template.normal_name`` as a positional argument deprecate. It's now a keyword-only argument.

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- Fixed a bug in ``Section`` objects that was causing them to return the properties of the whole page (15).
- Removed the deprecated attribute access methods.
The following deprecated methods accessible on ``Table`` and ``Tag`` objects, have been removed: ``.has``, ``.get``, ``.set`` .
Use ``.has_attr``, ``.get_attr``, ``.set_attr`` instead.
- Fixed a bug in ``set_attr`` method.
- Removed the deprecated ``Table.getdata`` method. Use ``Table.data`` instead.
- Removed the deprecated ``Table.getrdata(row_num)`` method. Use ``Table.data(row=row_num)`` instead.
- Removed the deprecated ``Table.getcdata(col_num)`` method. Use ``Table.data(col=col_num)`` instead.
- Removed the deprecated ``Table.table_attrs`` property. Use ``Table.attrs`` or other attribute-related methods instead.