Re: gnulib-tool.py: Fix pylint 'attribute-defined-outside-init' warnings.

[Bruno Haible]

Collin Funk wrote:
> I submitted a feature request here since I think a configuration
> option would probably be the best fix:
> 
>     https://github.com/pylint-dev/pylint/issues/9555

Thank you!

> When I say obvious in GLModule we have (comments are added):
> 
>      # Cache for the getter functions.
>      self.cache = dict()
>      # Raw content of description file.
>      self.content = ''
>      self.filesystem = GLFileSystem(self.config)
>      self.modulesystem = GLModuleSystem(self.config)
> 
> It is very clear that the cache and content are meant for internal
> use. The filesystem and modulesystem are less clear to me. I think
> they *could* be used from the outside, but should they be? Those will
> take more consideration.

Yes. There are actually two questions to ask for each property:
  - Is it currently used from outside the class?
  - Would it make sense to use it from outside the class, given the
    existing methods?

Bruno