`collections.namedtuple` fails to reconstruct from `_asdict()` when `typename` and `field_name` are the same non-ASCII identifier

[T90REAL]

Bug report

Bug description:

namedtuple fails to reconstruct an instance from its own _asdict() output when the typename and the field_name are the same non-ASCII character (e.g., 'µ').

Calling nt(**nt_instance._asdict()) should always be valid, but in this case, it raises a TypeError:

from collections import namedtuple

# 'µ' (mu) is a valid Python identifier.
nt = namedtuple('µ', ['µ'])

print(f"Created class: {nt}")

instance = nt(0)
print(f"Created instance: {instance}")

as_dict = instance._asdict()
print(f"Got _asdict(): {as_dict}")

reconstructed = nt(**as_dict)

Created class: <class '__main__.µ'>
Created instance: µ(µ=0)
Got _asdict(): {'µ': 0}
Traceback (most recent call last):
  File "/data/src/test.py", line 14, in <module>
    reconstructed = nt(**as_dict)
                    ^^^^^^^^^^^^^
TypeError: µ.__new__() got an unexpected keyword argument 'µ'

CPython versions tested on:

3.12

Operating systems tested on:

Linux

[serhiy-storchaka]

Normalization.

Look, there may be old closed issues for this.

[serhiy-storchaka]

See #58079. #67280, #78061. #78062, there may be more.

[picnixz]

As all those issues were closed, I'm going to close this one as well.