Disagreement with CPython for str.istitle/title/isdigit/isidentifier/isnumeric

sunmy2019

Python Documentation or reference to CPython source code

tested on current main: 1a9b10e

There are many examples and I picked one.

# the following is True in CPython and False in RustPython
print(
    "\u1c89".istitle() == False,
    "Ǳ".title() == "ǲ",
    "\u0661".isdigit() == True,
    "\u0c5d".isidentifier() == True,
    "\u3405".isnumeric() == True,
    # known issues of isalpha and isalnum omitted
)