def METHOD_NAME(self, cursor):
    """Indents the line with the cursor or the selected lines (one step more)."""
    with compress_undo(cursor):
        for block in blocks(cursor):
            cursor.setPosition(block.position())
            cursor.setPosition(block.position() + len(self.get_indent(cursor)))
            cursor.insertText(self.indentChar * self.indentWidth)