Selects an entire line.

        :param line: Line to select. If None, the current line will be selected
        :param apply_selection: True to apply selection on the text editor
            widget, False to just return the text cursor without setting it
            on the editor.
        :return: QTextCursor

def select_whole_line(self, line=None, apply_selection=True):
        """
        Selects an entire line.

        :param line: Line to select. If None, the current line will be selected
        :param apply_selection: True to apply selection on the text editor
            widget, False to just return the text cursor without setting it
            on the editor.
        :return: QTextCursor
        """
        if line is None:
            line = self.current_line_nbr()
        return self.select_lines(line, line, apply_selection=apply_selection)