Baseline alignment issue of `Code`

[ZhuChongjing]

Description of bug / unexpected behavior

When using Code, if I write pass, the code will move up a certain distance. But if I add a b at the end, it will return to normal. I wonder if Manim uses top alignment?

Expected behavior

I hope you can solve this fundamental problem. Otherwise, I will have to manually use the shift method to make adjustments.

How to reproduce the issue

Code for reproducing the problem

from manim import *

class CodeBug(Scene):
    def construct(self):
        code = Code(code_string="pass")
        code2 = Code(code_string="pass b")
        group = VGroup(code, code2).arrange(DOWN)
        self.add(group)