Description of the problem, including code/CLI snippet

https://python-gitlab.readthedocs.io/en/stable/api/gitlab.v4.html#gitlab.v4.objects.ProjectFile.decode

The method should return the content of a file in "str" type.

Expected Behavior

>> project.files.get(ref='master', file_path='some/path').decode()
>> 'content in file'

Actual Behavior

>> project.files.get(ref='master', file_path='some/path').decode()
>> b"content in file"

Specifications

• python-gitlab version: 2.6.0
• API version you are using (v3/v4): v4
• Gitlab server version (or gitlab.com): 13.6.1