(3.12+) tokenize exception type is wrong

[asottile]

Bug report

the document exception type for the tokenize.* functions is TokenError -- however it appears it now raises SyntaxError: https://docs.python.org/3.12/library/tokenize.html#tokenize.TokenError

Raised when either a docstring or expression that may be split over several lines is not completed anywhere in the file, for example:

import io
import tokenize

list(tokenize.generate_tokens(io.StringIO('"""').readline))

$ python3.11 t.py
Traceback (most recent call last):
 File "/home/asottile/workspace/switch-microcontroller/t.py", line 4, in <module>
 list(tokenize.generate_tokens(io.StringIO('"""').readline))
 File "/usr/lib/python3.11/tokenize.py", line 465, in _tokenize
 raise TokenError("EOF in multi-line string", strstart)
tokenize.TokenError: ('EOF in multi-line string', (1, 0))

and

# python3.13 t.py
Traceback (most recent call last):
 File "/y/pyupgrade/t.py", line 4, in <module>
 list(tokenize.generate_tokens(io.StringIO('"""').readline))
 File "/usr/lib/python3.13/tokenize.py", line 526, in _generate_tokens_from_c_tokenizer
 for info in it:
 File "<string>", line 1
 """
 ^
SyntaxError: unterminated triple-quoted string literal (detected at line 1)

Your environment

• CPython versions tested on: c7bf74b
• Operating system and architecture: ubuntu 22.04 x86_64

Linked PRs

• gh-105390: Correctly raise TokenError instead of SyntaxError for tokenize errors #105399
• [3.12] gh-105390: Correctly raise TokenError instead of SyntaxError for tokenize errors (GH-105399) #105439
• gh-105390: Add explicit type cast #105466
• [3.12] gh-105390: Add explicit type cast (GH-105466) #105472

[pablogsal]

CC: @isidentical @lysnikolaou @mgmacias95