context.run prints the codes of unicode chars from the output instead of printing the unicode characters themselves

[borco]

Create this simple task:

from invoke.tasks import task
from invoke.context import Context


@task
def black(c: Context) -> None:
    """Formats code with `black`."""
    c.run("black src")

Run the task with invoke:

invoke black

The invoke prints the code of the unicode chars returned by the black in its output:

All done! \u2728 \U0001f370 \u2728
...

However, this is the expected output (the output of running directly black src):

All done! ✨ 🍰 ✨
...

Executing black with subprocess.run produces the expected result:

Python 3.12.6 (tags/v3.12.6:a4a2d2b, Sep  6 2024, 20:11:23) [MSC v.1940 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import subprocess   
>>> subprocess.run("black src")
All done! ✨ 🍰 ✨
...
CompletedProcess(args='black src', returncode=0)
>>>

[borco]

Changing the black task code to look like bellow produces the expected results:

from io import StringIO

from invoke.tasks import task
from invoke.context import Context


@task
def black(c: Context) -> None:
    """Formats code with `black`."""
    s = StringIO()
    c.run("black src", err_stream=s)
    print(s.getvalue().encode().decode("unicode-escape"))

Invoking the task:

inv black

The output:

All done! ✨ 🍰 ✨
...

Is this a bug or am I missing something?