3.1.1: sphinx warnings

[kloczek]

Describe the bug
During generate documentation are emitted some warnings.
Here is command and output:

+ /usr/bin/python3 setup.py build_sphinx -b man --build-dir build/sphinx
running build_sphinx
Running Sphinx v4.2.0
making output directory... done
WARNING: html_static_path entry '_static' does not exist
building [mo]: targets for 0 po files that are out of date
building [man]: all manpages
updating environment: [new config] 61 added, 0 changed, 0 removed
reading sources... [100%] release_process
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/contributing.rst:290: WARNING: Definition list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/contributing.rst:292: WARNING: Definition list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth1/rfc5849/request_validator.py:docstring of oauthlib.oauth1.rfc5849.request_validator.RequestValidator.save_verifier:4: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth1/rfc5849/request_validator.py:docstring of oauthlib.oauth1.rfc5849.request_validator.RequestValidator.save_verifier:6: WARNING: Definition list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/oauth1/validator.rst:: WARNING: Anonymous hyperlink mismatch: 1 references but 0 targets.
See "backrefs" attribute for IDs.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.parse_request_body_response:11: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_authorization_request:10: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_authorization_request:17: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_authorization_request:22: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_refresh_token_request:16: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_token_request:10: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_token_request:15: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_token_revocation_request:8: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/clients/base.py:docstring of oauthlib.oauth2.rfc6749.clients.base.Client.prepare_token_revocation_request:14: WARNING: Field list ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/endpoints/introspect.py:docstring of oauthlib.oauth2.rfc6749.endpoints.introspect.IntrospectEndpoint.validate_introspect_request:17: WARNING: Unexpected indentation.
WARNING: missing attribute finalize_id_token in object oauthlib.oauth2.RequestValidator
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/openid/connect/core/endpoints/userinfo.py:docstring of oauthlib.openid.connect.core.endpoints.userinfo.UserInfoEndpoint.validate_userinfo_request:28: WARNING: Unexpected indentation.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/oauth2/oidc/validator.rst:8: WARNING: Title underline too short.

1. Create an OIDC provider
-----------------------
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/oauth2/oidc/validator.rst:14: WARNING: Title underline too short.

2. Migrate your OAuth2.0 provider into an OIDC provider
----------------------------------------------------
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/oauth2/oidc/validator.rst:14: WARNING: Title underline too short.

2. Migrate your OAuth2.0 provider into an OIDC provider
----------------------------------------------------
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/request_validator.py:docstring of oauthlib.oauth2.rfc6749.request_validator.RequestValidator:1: WARNING: duplicate object description of oauthlib.oauth2.RequestValidator, other instance in oauth2/oidc/id_tokens, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/request_validator.py:docstring of oauthlib.oauth2.rfc6749.request_validator.RequestValidator:1: WARNING: duplicate object description of oauthlib.oauth2.rfc6749.request_validator.RequestValidator, other instance in oauth2/oidc/id_tokens, use :noindex: for one of them
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/request_validator.py:docstring of oauthlib.oauth2.rfc6749.request_validator.RequestValidator.validate_code:10: WARNING: Block quote ends without a blank line; unexpected unindent.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/request_validator.py:docstring of oauthlib.oauth2.rfc6749.request_validator.RequestValidator.validate_code:18: WARNING: Unexpected indentation.
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/oauthlib/oauth2/rfc6749/request_validator.py:docstring of oauthlib.oauth2.rfc6749.request_validator.RequestValidator.introspect_token:20: WARNING: Unknown target name: "_jwt claims".
/home/tkloczko/rpmbuild/BUILD/oauthlib-3.1.1/docs/release_process.rst:29: WARNING: Title underline too short.

How to get on the notifications list
-----------------------------------
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
writing... python-oauthlib.3 { installation faq feature_matrix error_reporting contributing release_process oauth_1_versus_oauth_2 oauth1/oauth1 oauth1/client oauth1/server oauth1/validator oauth1/security oauth1/preconfigured_servers oauth1/endpoints/endpoints oauth1/endpoints/request_token oauth1/endpoints/authorization oauth1/endpoints/access_token oauth1/endpoints/resource oauth1/endpoints/signature_only oauth2/oauth2 oauth2/security oauth2/clients/client oauth2/clients/baseclient oauth2/clients/webapplicationclient oauth2/clients/mobileapplicationclient oauth2/clients/legacyapplicationclient oauth2/clients/backendapplicationclient oauth2/server oauth2/validator oauth2/preconfigured_servers oauth2/endpoints/endpoints oauth2/endpoints/authorization oauth2/endpoints/introspect oauth2/endpoints/token oauth2/endpoints/metadata oauth2/endpoints/revocation oauth2/endpoints/resource oauth2/grants/grants oauth2/grants/authcode oauth2/grants/implicit oauth2/grants/password oauth2/grants/credentials oauth2/grants/refresh oauth2/grants/jwt oauth2/grants/custom_validators oauth2/grants/custom_grant oauth2/tokens/tokens oauth2/tokens/bearer oauth2/tokens/saml oauth2/tokens/mac oauth2/oidc oauth2/oidc/validator oauth2/oidc/endpoints oauth2/oidc/userinfo oauth2/oidc/grants oauth2/oidc/dispatchers oauth2/oidc/authcode oauth2/oidc/implicit oauth2/oidc/hybrid oauth2/oidc/id_tokens } done
build succeeded, 27 warnings.

[auvipy]

can you atleast fix some warning and come with a PR?