python-gitlab tutorials' issue #813

Description of the problem, including code/CLI snippet

#1##
https://python-gitlab.readthedocs.io/en/stable/gl_objects/commits.html
"commits = project.commits.list(since='2016-01-01T00:00:00Z')"

#2##
https://github.com/python-gitlab/python-gitlab/blob/57fa4e37aaf6ccee0d75085520f96fd15752a3df/docs/gl_objects/commits.rst
python-gitlab/docs/gl_objects/commits.rst
"commits = project.commits.list(since='2016-01-01T00:00:00Z')"

Dear Sir/Miss,
I found there have something ambiguity in tutorials/github which where maybe need to change. Please check as following:

From #1##,#2## address's message, i thought when you searched commits info from '2016-01-01xx', maybe you need to add 'all=True' in commits.

If you use commits = project.commits.list(since='2016-01-01T00:00:00Z'), it will loses a lot of commits info, but commits = project.commits.list(all= True, since='2016-01-01T00:00:00Z') won't.

Could you please change this in tutorials/github, or add something comments on it. I hope this will more clear and useful for others. Maybe this will help you.

Expected Behavior

change the example；
old one : commits = project.commits.list(since='2016-01-01T00:00:00Z')
more clear way : commits = project.commits.list(all= True, since='2016-01-01T00:00:00Z')

Actual Behavior

Specifications

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