missing `+` in the code example in docu custom-generators-as-python-requires

[ifxfrancois]

Hi, I think the code example at Custom generators as python_requires is missing a +

for dep, _ in self._conanfile.dependencies.items():
            deps_info = f"{dep.ref.name}, {dep.ref.version}"

should be

for dep, _ in self._conanfile.dependencies.items():
            deps_info += f"{dep.ref.name}, {dep.ref.version}"

[memsharded]

Thanks for reporting this @ifxfrancois

I am doing PR https://github.com/conan-io/docs/pull/3781 to improve it