from __future__ import annotations from manim import * # This module is used in the CLI tests in tests_CLi.py.  class WriteStuff(Scene):    def construct(self):        example_text = Tex("This is a some text", tex_to_color_map={"text": YELLOW})        example_tex = MathTex(            "\\sum_{k=1}^\\infty {1 \\over k^2} = {\\pi^2 \\over 6}",        )        group = VGroup(example_text, example_tex)        group.arrange(DOWN)        group.width = config["frame_width"] - 2 * LARGE_BUFF         self.play(Write(example_text))