Not the same signature as the builtin version

[Neradoc]

• n versus size
• keyword only arguments after that in the builtin version
• different type hints and default values for the header and trailer (not a big deal)

class adafruit_pixelbuf.PixelBuf(n: int, byteorder: str = 'BGR', brightness: float = 1.0,
auto_write: bool = False, header: Optional[bytes] = None, trailer: Optional[bytes] = None):

class adafruit_pixelbuf.PixelBuf(size: int, *, byteorder: str = 'BGR', brightness: float = 0,
auto_write: bool = False, header: circuitpython_typing.ReadableBuffer = b'', trailer: circuitpython_typing.ReadableBuffer = b''):

I think all the real-world uses work with both, giving the size as positional and the rest as keywords.
So I wonder if something should be done about that ?
(In addition the default brightness is wrong in the builtin docs but that's not an incompatibility).

[tekktrik]

I can look into this in a little while, assigning to myself so I don't forget