Google processor does not preserve indentation (breaks nested lists)

[jackgerrits]

Describe the bug

The Google processor rewrites arguments to include type information. It looks like in order to normalize, indentation is removed. This breaks nested unordered/ordered lists.

pydoc-markdown/src/pydoc_markdown/contrib/processors/google.py

Line 121 in 3f20390

def _process(self, node: docspec.ApiObject):

For example:

- Test
  - nested

Would be transformed to:

  - Test
  - nested

Expected behavior

Indentation to be preserved.