Error installing Newlines are not allowed

[zyddnys]

pip3 install pysubnettree yields Newlines are not allowed error because \n is contained in the description. Full error:

Collecting pysubnettree
  Downloading https://files.pythonhosted.org/packages/3d/32/ffa0e8150c2a455bb202e1a1ca384ff3e6ea746968d92f5a53bfd6e4b368/pysubnettree-0.35.tar.gz (51kB)
    100% |████████████████████████████████| 51kB 1.4MB/s 
    Complete output from command python setup.py egg_info:
    running egg_info
    creating pip-egg-info/pysubnettree.egg-info
    writing pip-egg-info/pysubnettree.egg-info/PKG-INFO
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-61uigbkv/pysubnettree/setup.py", line 22, in <module>
        setup(name="pysubnettree",
      File "/home/unknown/.local/lib/python3.8/site-packages/setuptools/__init__.py", line 153, in setup
        return distutils.core.setup(**attrs)
      File "/usr/lib/python3.8/distutils/core.py", line 148, in setup
        dist.run_commands()
      File "/usr/lib/python3.8/distutils/dist.py", line 966, in run_commands
        self.run_command(cmd)
      File "/usr/lib/python3.8/distutils/dist.py", line 985, in run_command
        cmd_obj.run()
      File "/home/unknown/.local/lib/python3.8/site-packages/setuptools/command/egg_info.py", line 292, in run
        writer(self, ep.name, os.path.join(self.egg_info, ep.name))
      File "/home/unknown/.local/lib/python3.8/site-packages/setuptools/command/egg_info.py", line 656, in write_pkg_info
        metadata.write_pkg_info(cmd.egg_info)
      File "/usr/lib/python3.8/distutils/dist.py", line 1117, in write_pkg_info
        self.write_pkg_file(pkg_info)
      File "/home/unknown/.local/lib/python3.8/site-packages/setuptools/dist.py", line 167, in write_pkg_file
        write_field('Summary', single_line(self.get_description()))
      File "/home/unknown/.local/lib/python3.8/site-packages/setuptools/dist.py", line 151, in single_line
        raise ValueError('Newlines are not allowed')
    ValueError: Newlines are not allowed

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-61uigbkv/pysubnettree/