'Replace an entire line with ``new_text``.
:param line_nbr: line number of the line to change.
:param new_text: The replacement text.'

def set_line_text(self, line_nbr, new_text):

    editor = self._editor
    text_cursor = self._move_cursor_to(line_nbr)
    text_cursor.select(text_cursor.LineUnderCursor)
    text_cursor.insertText(new_text)
    editor.setTextCursor(text_cursor)
