Fix unicode entrypoint issue

[julienmalard]

Fixes: #252

Test for valid unicode Python identifiers (https://peps.python.org/pep-3131/) in entrypoints. Should reproduce #252 .

[uranusjr]

Should also check module is a valid identifier

[julienmalard]

Thanks, done!

I also have a doubt - in the test files, entrypoints are not quoted. However, in a yaml file, the value (attrs) would always be quoted and the key (module) could optionally be quoted as well.
Are the quotes stripped before arriving at the relevant parts of the code?

I also did not understand the extras part of the original regex and so did not reimplement it. Is this fine, or should we add an example of extras the to tests?

[julienmalard]

Fixes #252

[Secrus]

I also did not understand the extras part of the original regex and so did not reimplement it. Is this fine, or should we add an example of extras the to tests?

It's a legacy distutils/setuptools thing, that allowed for a conditional installation of the entrypoint based on the chosen extra. It's not a standard anymore, but we should keep it working and the new implementation should consider it a viable (although ignored) part of an entrypoint spec.