[BUG-General] CodeMObject swallows empty lines

[mrdon]

Describe the bug
When rendering code with the CodeMObject class, any empty lines in the source file are ignored.

To Reproduce

Problematic Code

code.py

from textwrap import wrap
from typing import Optional

from manim import *


class CodeScene(MovingCameraScene):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.caption = None.

Used by:

tex = Code("code.py")
self.play(ShowCreation(tex))

Expected behavior
I expected to see rendered text with new lines between the imports and class preserved. Instead, they were removed and the text was compressed.

Output Media Files

Images/GIFs

System Specifications

System Details

• OS (with version, e.g Windows 10 v2004 or macOS 10.15 (Catalina)): Pop!_OS 20.04 LTS
• RAM: 64gb
• Python version (python/py/python3 --version): 3.8.3
• Installed modules (provide output from pip list):

appdirs==1.4.4
black==20.8b1
cairocffi==1.1.0
cffi==1.14.3
click==7.1.2
colorama==0.4.4
colour==0.1.5
commonmark==0.9.1
grpcio==1.33.2
grpcio-tools==1.33.2
manimce==0.1.0
mypy-extensions==0.4.3
numpy==1.19.3
pangocairocffi==0.3.2
pangocffi==0.6.0
pathspec==0.8.0
pathtools==0.1.2
Pillow==8.0.1
progressbar==2.5
protobuf==3.13.0
pycairo==1.20.0
pycparser==2.20
pydub==0.24.1
Pygments==2.7.2
regex==2020.10.28
rich==9.1.0
scipy==1.5.3
six==1.15.0
toml==0.10.1
tqdm==4.51.0
typed-ast==1.4.1
typing-extensions==3.7.4.3
watchdog==0.10.3

Latex details

• Distribution (e.g. TeX Live 2020):

• Installed packages:

FFMPEG

Output of `ffmpeg -version`:

ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil      56. 31.100 / 56. 31.100
libavcodec     58. 54.100 / 58. 54.100
libavformat    58. 29.100 / 58. 29.100
libavdevice    58.  8.100 / 58.  8.100
libavfilter     7. 57.100 /  7. 57.100
libavresample   4.  0.  0 /  4.  0.  0
libswscale      5.  5.100 /  5.  5.100
libswresample   3.  5.100 /  3.  5.100
libpostproc    55.  5.100 / 55.  5.100

Additional context
Add any other context about the problem here.