diff --git a/rhodecode/api/__init__.py b/rhodecode/api/__init__.py
--- a/rhodecode/api/__init__.py
+++ b/rhodecode/api/__init__.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -114,7 +112,7 @@ def jsonrpc_response(request, result):
     )
 
 
-def jsonrpc_error(request, message, retid=None, code: typing.Optional[int] = None, headers: typing.Optional[dict] = None):
+def jsonrpc_error(request, message, retid=None, code: int | None = None, headers: dict | None = None):
     """
     Generate a Response object with a JSON-RPC error body
     """
@@ -174,9 +172,9 @@ def exception_view(exc, request):
 
         statsd = request.registry.statsd
         if statsd:
-            exc_type = "{}.{}".format(exc.__class__.__module__, exc.__class__.__name__)
+            exc_type = f"{exc.__class__.__module__}.{exc.__class__.__name__}"
             statsd.incr('rhodecode_exception_total',
-                        tags=["exc_source:api", "type:{}".format(exc_type)])
+                        tags=["exc_source:api", f"type:{exc_type}"])
 
     return jsonrpc_error(request, fault_message, rpc_id)
 
@@ -210,8 +208,8 @@ def request_view(request):
         if not auth_u.ip_allowed:
             return jsonrpc_error(
                 request, retid=request.rpc_id,
-                message='Request from IP:%s not allowed' % (
-                    request.rpc_ip_addr,))
+                message='Request from IP:{} not allowed'.format(
+                    request.rpc_ip_addr))
         else:
             log.info('Access for IP:%s allowed', request.rpc_ip_addr)
 
@@ -357,7 +355,7 @@ def setup_request(request):
         json_body = ext_json.json.loads(raw_body)
     except ValueError as e:
         # catch JSON errors Here
-        raise JSONRPCError("JSON parse error ERR:%s RAW:%r" % (e, raw_body))
+        raise JSONRPCError("JSON parse error ERR:{} RAW:{!r}".format(e, raw_body))
 
     request.rpc_id = json_body.get('id')
     request.rpc_method = json_body.get('method')
diff --git a/rhodecode/api/exc.py b/rhodecode/api/exc.py
--- a/rhodecode/api/exc.py
+++ b/rhodecode/api/exc.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -22,7 +20,7 @@
 class JSONRPCBaseError(Exception):
     def __init__(self, message='', *args):
         self.message = message
-        super(JSONRPCBaseError, self).__init__(message, *args)
+        super().__init__(message, *args)
 
 
 class JSONRPCError(JSONRPCBaseError):
@@ -33,7 +31,7 @@ class JSONRPCValidationError(JSONRPCBase
 
     def __init__(self, *args, **kwargs):
         self.colander_exception = kwargs.pop('colander_exc')
-        super(JSONRPCValidationError, self).__init__(
+        super().__init__(
             message=self.colander_exception, *args)
 
 
diff --git a/rhodecode/api/utils.py b/rhodecode/api/utils.py
--- a/rhodecode/api/utils.py
+++ b/rhodecode/api/utils.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2014-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -224,7 +222,7 @@ def get_user_or_error(userid):
 
     if user is None:
         raise JSONRPCError(
-            'user `%s` does not exist' % (userid,))
+            'user `{}` does not exist'.format(userid))
     return user
 
 
@@ -247,7 +245,7 @@ def get_repo_or_error(repoid):
 
     if repo is None:
         raise JSONRPCError(
-            'repository `%s` does not exist' % (repoid,))
+            'repository `{}` does not exist'.format(repoid))
     return repo
 
 
@@ -270,7 +268,7 @@ def get_repo_group_or_error(repogroupid)
 
     if repo_group is None:
         raise JSONRPCError(
-            'repository group `%s` does not exist' % (repogroupid,))
+            'repository group `{}` does not exist'.format(repogroupid))
     return repo_group
 
 
@@ -293,7 +291,7 @@ def get_user_group_or_error(usergroupid)
 
     if user_group is None:
         raise JSONRPCError(
-            'user group `%s` does not exist' % (usergroupid,))
+            'user group `{}` does not exist'.format(usergroupid))
     return user_group
 
 
@@ -307,9 +305,9 @@ def get_perm_or_error(permid, prefix=Non
 
     perm = PermissionModel.cls.get_by_key(permid)
     if perm is None:
-        msg = 'permission `{}` does not exist.'.format(permid)
+        msg = f'permission `{permid}` does not exist.'
         if prefix:
-            msg += ' Permission should start with prefix: `{}`'.format(prefix)
+            msg += f' Permission should start with prefix: `{prefix}`'
         raise JSONRPCError(msg)
 
     if prefix:
@@ -329,7 +327,7 @@ def get_gist_or_error(gistid):
 
     gist = GistModel.cls.get_by_access_id(gistid)
     if gist is None:
-        raise JSONRPCError('gist `%s` does not exist' % (gistid,))
+        raise JSONRPCError('gist `{}` does not exist'.format(gistid))
     return gist
 
 
@@ -346,8 +344,8 @@ def get_pull_request_or_error(pullreques
     except ValueError:
         raise JSONRPCError('pullrequestid must be an integer')
     if not pull_request:
-        raise JSONRPCError('pull request `%s` does not exist' % (
-            pullrequestid,))
+        raise JSONRPCError('pull request `{}` does not exist'.format(
+            pullrequestid))
     return pull_request
 
 
@@ -394,7 +392,7 @@ def get_commit_or_error(ref, repo):
         # once get_commit supports ref_types
         return get_commit_from_ref_name(repo, ref_hash)
     except RepositoryError:
-        raise JSONRPCError('Ref `{ref}` does not exist'.format(ref=ref))
+        raise JSONRPCError(f'Ref `{ref}` does not exist')
 
 
 def _get_ref_hash(repo, type_, name):
diff --git a/rhodecode/api/views/__init__.py b/rhodecode/api/views/__init__.py
--- a/rhodecode/api/views/__init__.py
+++ b/rhodecode/api/views/__init__.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2015-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
diff --git a/rhodecode/api/views/deprecated_api.py b/rhodecode/api/views/deprecated_api.py
--- a/rhodecode/api/views/deprecated_api.py
+++ b/rhodecode/api/views/deprecated_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
diff --git a/rhodecode/api/views/gist_api.py b/rhodecode/api/views/gist_api.py
--- a/rhodecode/api/views/gist_api.py
+++ b/rhodecode/api/views/gist_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -51,13 +49,13 @@ def get_gist(request, apiuser, gistid, c
 
     if not has_superadmin_permission(apiuser):
         if gist.gist_owner != apiuser.user_id:
-            raise JSONRPCError('gist `%s` does not exist' % (gistid,))
+            raise JSONRPCError('gist `{}` does not exist'.format(gistid))
     data = gist.get_api_data()
 
     if content:
         from rhodecode.model.gist import GistModel
         rev, gist_files = GistModel().get_gist_files(gistid)
-        data['content'] = dict([(x.path, x.str_content) for x in gist_files])
+        data['content'] = {x.path: x.str_content for x in gist_files}
     return data
 
 
@@ -242,13 +240,13 @@ def delete_gist(request, apiuser, gistid
     gist = get_gist_or_error(gistid)
     if not has_superadmin_permission(apiuser):
         if gist.gist_owner != apiuser.user_id:
-            raise JSONRPCError('gist `%s` does not exist' % (gistid,))
+            raise JSONRPCError('gist `{}` does not exist'.format(gistid))
 
     try:
         GistModel().delete(gist)
         Session().commit()
         return {
-            'msg': 'deleted gist ID:%s' % (gist.gist_access_id,),
+            'msg': 'deleted gist ID:{}'.format(gist.gist_access_id),
             'gist': None
         }
     except Exception:
diff --git a/rhodecode/api/views/pull_request_api.py b/rhodecode/api/views/pull_request_api.py
--- a/rhodecode/api/views/pull_request_api.py
+++ b/rhodecode/api/views/pull_request_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -322,7 +320,7 @@ def merge_pull_request(
 
         reasons = ','.join(error_messages)
         raise JSONRPCError(
-            'merge not possible for following reasons: {}'.format(reasons))
+            f'merge not possible for following reasons: {reasons}')
 
     target_repo = pull_request.target_repo
     extras = vcs_operation_context(
@@ -529,7 +527,7 @@ def comment_pull_request(
 
     if not PullRequestModel().check_user_read(
             pull_request, apiuser, api=True):
-        raise JSONRPCError('repository `%s` does not exist' % (repoid,))
+        raise JSONRPCError('repository `{}` does not exist'.format(repoid))
     message = Optional.extract(message)
     status = Optional.extract(status)
     commit_id = Optional.extract(commit_id)
@@ -758,7 +756,7 @@ def create_pull_request(
         reviewers = validate_default_reviewers(
             reviewer_objects, default_reviewers_data)
     except ValueError as e:
-        raise JSONRPCError('Reviewers Validation: {}'.format(e))
+        raise JSONRPCError(f'Reviewers Validation: {e}')
 
     # now MERGE our given with the calculated from the default rules
     just_observers = [
@@ -770,7 +768,7 @@ def create_pull_request(
         observers = validate_observers(
             observer_objects, default_reviewers_data)
     except ValueError as e:
-        raise JSONRPCError('Observer Validation: {}'.format(e))
+        raise JSONRPCError(f'Observer Validation: {e}')
 
     title = Optional.extract(title)
     if not title:
@@ -820,7 +818,7 @@ def create_pull_request(
 
     Session().commit()
     data = {
-        'msg': 'Created new pull request `{}`'.format(title),
+        'msg': f'Created new pull request `{title}`',
         'pull_request_id': pull_request.pull_request_id,
     }
     return data
@@ -903,12 +901,12 @@ def update_pull_request(
     if not PullRequestModel().check_user_update(
             pull_request, apiuser, api=True):
         raise JSONRPCError(
-            'pull request `%s` update failed, no permission to update.' % (
-                pullrequestid,))
+            'pull request `{}` update failed, no permission to update.'.format(
+                pullrequestid))
     if pull_request.is_closed():
         raise JSONRPCError(
-            'pull request `%s` update failed, pull request is closed' % (
-                pullrequestid,))
+            'pull request `{}` update failed, pull request is closed'.format(
+                pullrequestid))
 
     reviewer_objects = Optional.extract(reviewers) or []
     observer_objects = Optional.extract(observers) or []
@@ -968,7 +966,7 @@ def update_pull_request(
         try:
             reviewers = validate_default_reviewers(reviewer_objects, default_reviewers_data)
         except ValueError as e:
-            raise JSONRPCError('Reviewers Validation: {}'.format(e))
+            raise JSONRPCError(f'Reviewers Validation: {e}')
     else:
         reviewers = []
 
@@ -976,7 +974,7 @@ def update_pull_request(
         try:
             observers = validate_default_reviewers(reviewer_objects, default_reviewers_data)
         except ValueError as e:
-            raise JSONRPCError('Observer Validation: {}'.format(e))
+            raise JSONRPCError(f'Observer Validation: {e}')
     else:
         observers = []
 
@@ -1023,7 +1021,7 @@ def update_pull_request(
             request, pr_broadcast_channel, apiuser, msg)
 
     data = {
-        'msg': 'Updated pull request `{}`'.format(pull_request.pull_request_id),
+        'msg': f'Updated pull request `{pull_request.pull_request_id}`',
         'pull_request': pull_request.get_api_data(),
         'updated_commits': commit_changes,
         'updated_reviewers': reviewers_changes,
@@ -1084,7 +1082,7 @@ def close_pull_request(
 
     if pull_request.is_closed():
         raise JSONRPCError(
-            'pull request `%s` is already closed' % (pullrequestid,))
+            'pull request `{}` is already closed'.format(pullrequestid))
 
     # only owner or admin or person with write permissions
     allowed_to_close = PullRequestModel().check_user_update(
@@ -1092,8 +1090,8 @@ def close_pull_request(
 
     if not allowed_to_close:
         raise JSONRPCError(
-            'pull request `%s` close failed, no permission to close.' % (
-                pullrequestid,))
+            'pull request `{}` close failed, no permission to close.'.format(
+                pullrequestid))
 
     # message we're using to close the PR, else it's automatically generated
     message = Optional.extract(message)
diff --git a/rhodecode/api/views/repo_api.py b/rhodecode/api/views/repo_api.py
--- a/rhodecode/api/views/repo_api.py
+++ b/rhodecode/api/views/repo_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -265,7 +263,7 @@ def get_repos(request, apiuser, root=Opt
         parent = RepoGroup.get_by_group_name(root)
         if not parent:
             raise JSONRPCError(
-                'Root repository group `{}` does not exist'.format(root))
+                f'Root repository group `{root}` does not exist')
 
         if traverse:
             repos = RepoModel().get_repos_for_root(root=root, traverse=traverse)
@@ -626,7 +624,7 @@ def get_repo_fts_tree(request, apiuser, 
     cache_seconds = rhodecode.ConfigGet().get_int('rc_cache.cache_repo.expiration_time')
     cache_on = cache_seconds > 0
 
-    cache_namespace_uid = 'repo.{}'.format(repo_id)
+    cache_namespace_uid = f'repo.{repo_id}'
     rc_cache.get_or_create_region('cache_repo', cache_namespace_uid)
 
     def compute_fts_tree(cache_ver, repo_id, commit_id, root_path):
@@ -869,17 +867,17 @@ def create_repo(
         task_id = get_task_id(task)
         # no commit, it's done in RepoModel, or async via celery
         return {
-            'msg': "Created new repository `%s`" % (schema_data['repo_name'],),
+            'msg': "Created new repository `{}`".format(schema_data['repo_name']),
             'success': True,  # cannot return the repo data here since fork
             # can be done async
             'task': task_id
         }
     except Exception:
         log.exception(
-            u"Exception while trying to create the repository %s",
+            "Exception while trying to create the repository %s",
             schema_data['repo_name'])
         raise JSONRPCError(
-            'failed to create repository `%s`' % (schema_data['repo_name'],))
+            'failed to create repository `{}`'.format(schema_data['repo_name']))
 
 
 @jsonrpc_method()
@@ -920,13 +918,13 @@ def add_field_to_repo(request, apiuser, 
                                    field_desc=description)
         Session().commit()
         return {
-            'msg': "Added new repository field `%s`" % (key,),
+            'msg': "Added new repository field `{}`".format(key),
             'success': True,
         }
     except Exception:
         log.exception("Exception occurred while trying to add field to repo")
         raise JSONRPCError(
-            'failed to create new field for repository `%s`' % (repoid,))
+            'failed to create new field for repository `{}`'.format(repoid))
 
 
 @jsonrpc_method()
@@ -959,14 +957,14 @@ def remove_field_from_repo(request, apiu
         RepoModel().delete_repo_field(repo, field_key=key)
         Session().commit()
         return {
-            'msg': "Deleted repository field `%s`" % (key,),
+            'msg': "Deleted repository field `{}`".format(key),
             'success': True,
         }
     except Exception:
         log.exception(
             "Exception occurred while trying to delete field from repo")
         raise JSONRPCError(
-            'failed to delete field for repository `%s`' % (repoid,))
+            'failed to delete field for repository `{}`'.format(repoid))
 
 
 @jsonrpc_method()
@@ -979,7 +977,7 @@ def update_repo(
         enable_statistics=Optional(False),
         enable_locking=Optional(False),
         enable_downloads=Optional(False), fields=Optional('')):
-    """
+    r"""
     Updates a repository with the given information.
 
     This command can only be run using an |authtoken| with at least
@@ -1132,12 +1130,12 @@ def update_repo(
             user=apiuser, repo=repo)
         Session().commit()
         return {
-            'msg': 'updated repo ID:%s %s' % (repo.repo_id, repo.repo_name),
+            'msg': 'updated repo ID:{} {}'.format(repo.repo_id, repo.repo_name),
             'repository': repo.get_api_data(include_secrets=include_secrets)
         }
     except Exception:
         log.exception(
-            u"Exception while trying to update the repository %s",
+            "Exception while trying to update the repository %s",
             repoid)
         raise JSONRPCError('failed to update repo `%s`' % repoid)
 
@@ -1276,7 +1274,7 @@ def fork_repo(request, apiuser, repoid, 
         task_id = get_task_id(task)
 
         return {
-            'msg': 'Created fork of `%s` as `%s`' % (
+            'msg': 'Created fork of `{}` as `{}`'.format(
                 repo.repo_name, schema_data['repo_name']),
             'success': True,  # cannot return the repo data here since fork
             # can be done async
@@ -1284,10 +1282,10 @@ def fork_repo(request, apiuser, repoid, 
         }
     except Exception:
         log.exception(
-            u"Exception while trying to create fork %s",
+            "Exception while trying to create fork %s",
             schema_data['repo_name'])
         raise JSONRPCError(
-            'failed to fork repository `%s` as `%s`' % (
+            'failed to fork repository `{}` as `{}`'.format(
                 repo_name, schema_data['repo_name']))
 
 
@@ -1353,13 +1351,13 @@ def delete_repo(request, apiuser, repoid
         ScmModel().mark_for_invalidation(repo_name, delete=True)
         Session().commit()
         return {
-            'msg': 'Deleted repository `%s`%s' % (repo_name, _forks_msg),
+            'msg': 'Deleted repository `{}`{}'.format(repo_name, _forks_msg),
             'success': True
         }
     except Exception:
         log.exception("Exception occurred while trying to delete repo")
         raise JSONRPCError(
-            'failed to delete repository `%s`' % (repo_name,)
+            'failed to delete repository `{}`'.format(repo_name)
         )
 
 
@@ -1414,7 +1412,7 @@ def invalidate_cache(request, apiuser, r
     try:
         ScmModel().mark_for_invalidation(repo.repo_name, delete=delete)
         return {
-            'msg': 'Cache for repository `%s` was invalidated' % (repoid,),
+            'msg': 'Cache for repository `{}` was invalidated'.format(repoid),
             'repository': repo.repo_name
         }
     except Exception:
@@ -1696,7 +1694,7 @@ def comment_commit(
 
         return {
             'msg': (
-                'Commented on commit `%s` for repository `%s`' % (
+                'Commented on commit `{}` for repository `{}`'.format(
                     comment.revision, repo.repo_name)),
             'status_change': status,
             'success': True,
@@ -1708,7 +1706,7 @@ def comment_commit(
     except Exception:
         log.exception("Exception occurred while trying to comment on commit")
         raise JSONRPCError(
-            'failed to set comment on repository `%s`' % (repo.repo_name,)
+            'failed to set comment on repository `{}`'.format(repo.repo_name)
         )
 
 
@@ -1815,14 +1813,14 @@ def get_comment(request, apiuser, commen
 
     comment = ChangesetComment.get(comment_id)
     if not comment:
-        raise JSONRPCError('comment `%s` does not exist' % (comment_id,))
+        raise JSONRPCError('comment `{}` does not exist'.format(comment_id))
 
     perms = ('repository.read', 'repository.write', 'repository.admin')
     has_comment_perm = HasRepoPermissionAnyApi(*perms)\
         (user=apiuser, repo_name=comment.repo.repo_name)
 
     if not has_comment_perm:
-        raise JSONRPCError('comment `%s` does not exist' % (comment_id,))
+        raise JSONRPCError('comment `{}` does not exist'.format(comment_id))
 
     return comment
 
@@ -1860,7 +1858,7 @@ def edit_comment(request, apiuser, messa
     auth_user = apiuser
     comment = ChangesetComment.get(comment_id)
     if not comment:
-        raise JSONRPCError('comment `%s` does not exist' % (comment_id,))
+        raise JSONRPCError('comment `{}` does not exist'.format(comment_id))
 
     is_super_admin = has_superadmin_permission(apiuser)
     is_repo_admin = HasRepoPermissionAnyApi('repository.admin')\
@@ -1891,11 +1889,11 @@ def edit_comment(request, apiuser, messa
         Session().commit()
     except CommentVersionMismatch:
         raise JSONRPCError(
-            'comment ({}) version ({}) mismatch'.format(comment_id, version)
+            f'comment ({comment_id}) version ({version}) mismatch'
         )
     if not comment_history and not message:
         raise JSONRPCError(
-            "comment ({}) can't be changed with empty string".format(comment_id)
+            f"comment ({comment_id}) can't be changed with empty string"
         )
 
     if comment.pull_request:
@@ -1989,7 +1987,7 @@ def grant_user_permission(request, apius
         PermissionModel().flush_user_permission_caches(changes)
 
         return {
-            'msg': 'Granted perm: `%s` for user: `%s` in repo: `%s`' % (
+            'msg': 'Granted perm: `{}` for user: `{}` in repo: `{}`'.format(
                 perm.permission_name, user.username, repo.repo_name
             ),
             'success': True
@@ -1997,7 +1995,7 @@ def grant_user_permission(request, apius
     except Exception:
         log.exception("Exception occurred while trying edit permissions for repo")
         raise JSONRPCError(
-            'failed to edit permission for user: `%s` in repo: `%s`' % (
+            'failed to edit permission for user: `{}` in repo: `{}`'.format(
                 userid, repoid
             )
         )
@@ -2052,7 +2050,7 @@ def revoke_user_permission(request, apiu
         PermissionModel().flush_user_permission_caches(changes)
 
         return {
-            'msg': 'Revoked perm for user: `%s` in repo: `%s`' % (
+            'msg': 'Revoked perm for user: `{}` in repo: `{}`'.format(
                 user.username, repo.repo_name
             ),
             'success': True
@@ -2060,7 +2058,7 @@ def revoke_user_permission(request, apiu
     except Exception:
         log.exception("Exception occurred while trying revoke permissions to repo")
         raise JSONRPCError(
-            'failed to edit permission for user: `%s` in repo: `%s`' % (
+            'failed to edit permission for user: `{}` in repo: `{}`'.format(
                 userid, repoid
             )
         )
@@ -2122,7 +2120,7 @@ def grant_user_group_permission(request,
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     perm_additions = [[user_group.users_group_id, perm.permission_name, "user_group"]]
     try:
@@ -2196,7 +2194,7 @@ def revoke_user_group_permission(request
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     perm_deletions = [[user_group.users_group_id, None, "user_group"]]
     try:
@@ -2213,7 +2211,7 @@ def revoke_user_group_permission(request
         PermissionModel().flush_user_permission_caches(changes)
 
         return {
-            'msg': 'Revoked perm for user group: `%s` in repo: `%s`' % (
+            'msg': 'Revoked perm for user group: `{}` in repo: `{}`'.format(
                 user_group.users_group_name, repo.repo_name
             ),
             'success': True
@@ -2282,7 +2280,7 @@ def pull(request, apiuser, repoid, remot
         ScmModel().pull_changes(
             repo.repo_name, apiuser.username, remote_uri=remote_uri)
         return {
-            'msg': 'Pulled from url `%s` on repo `%s`' % (
+            'msg': 'Pulled from url `{}` on repo `{}`'.format(
                 remote_uri_display, repo.repo_name),
             'repository': repo.repo_name
         }
@@ -2351,14 +2349,14 @@ def strip(request, apiuser, repoid, revi
             user=apiuser, commit=True)
 
         return {
-            'msg': 'Stripped commit %s from repo `%s`' % (
+            'msg': 'Stripped commit {} from repo `{}`'.format(
                 revision, repo.repo_name),
             'repository': repo.repo_name
         }
     except Exception:
         log.exception("Exception while trying to strip")
         raise JSONRPCError(
-            'Unable to strip commit %s from repo `%s`' % (
+            'Unable to strip commit {} from repo `{}`'.format(
                 revision, repo.repo_name)
         )
 
@@ -2413,7 +2411,7 @@ def get_repo_settings(request, apiuser, 
         if key is not None:
             settings = settings.get(key, None)
     except Exception:
-        msg = 'Failed to fetch settings for repository `{}`'.format(repoid)
+        msg = f'Failed to fetch settings for repository `{repoid}`'
         log.exception(msg)
         raise JSONRPCError(msg)
 
@@ -2466,7 +2464,7 @@ def set_repo_settings(request, apiuser, 
             new_settings, inherit_global_settings=inherit_global_settings)
         Session().commit()
     except Exception:
-        msg = 'Failed to update settings for repository `{}`'.format(repoid)
+        msg = f'Failed to update settings for repository `{repoid}`'
         log.exception(msg)
         raise JSONRPCError(msg)
 
diff --git a/rhodecode/api/views/repo_group_api.py b/rhodecode/api/views/repo_group_api.py
--- a/rhodecode/api/views/repo_group_api.py
+++ b/rhodecode/api/views/repo_group_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -98,7 +96,7 @@ def get_repo_group(request, apiuser, rep
         if not HasRepoGroupPermissionAnyApi(*_perms)(
                 user=apiuser, group_name=repo_group.group_name):
             raise JSONRPCError(
-                'repository group `%s` does not exist' % (repogroupid,))
+                'repository group `{}` does not exist'.format(repogroupid))
 
     permissions = []
     for _user in repo_group.permissions():
@@ -242,7 +240,7 @@ def create_repo_group(
     except Exception:
         log.exception("Exception occurred while trying create repo group")
         raise JSONRPCError(
-            'failed to create repo group `%s`' % (validated_group_name,))
+            'failed to create repo group `{}`'.format(validated_group_name))
 
 
 @jsonrpc_method()
@@ -331,13 +329,13 @@ def update_repo_group(
 
         Session().commit()
         return {
-            'msg': 'updated repository group ID:%s %s' % (
+            'msg': 'updated repository group ID:{} {}'.format(
                 repo_group.group_id, repo_group.group_name),
             'repo_group': repo_group.get_api_data()
         }
     except Exception:
         log.exception(
-            u"Exception occurred while trying update repo group %s",
+            "Exception occurred while trying update repo group %s",
             repogroupid)
         raise JSONRPCError('failed to update repository group `%s`'
                            % (repogroupid,))
@@ -629,7 +627,7 @@ def grant_user_group_permission_to_repo_
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     apply_to_children = Optional.extract(apply_to_children)
 
@@ -722,7 +720,7 @@ def revoke_user_group_permission_from_re
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     apply_to_children = Optional.extract(apply_to_children)
 
diff --git a/rhodecode/api/views/search_api.py b/rhodecode/api/views/search_api.py
--- a/rhodecode/api/views/search_api.py
+++ b/rhodecode/api/views/search_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -109,7 +107,7 @@ def search(request, apiuser, search_quer
             searcher.cleanup()
 
         if not search_result['error']:
-            data['execution_time'] = '%s results (%.4f seconds)' % (
+            data['execution_time'] = '{} results ({:.4f} seconds)'.format(
                 search_result['count'],
                 search_result['runtime'])
         else:
diff --git a/rhodecode/api/views/server_api.py b/rhodecode/api/views/server_api.py
--- a/rhodecode/api/views/server_api.py
+++ b/rhodecode/api/views/server_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
diff --git a/rhodecode/api/views/testing_api.py b/rhodecode/api/views/testing_api.py
--- a/rhodecode/api/views/testing_api.py
+++ b/rhodecode/api/views/testing_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
diff --git a/rhodecode/api/views/user_api.py b/rhodecode/api/views/user_api.py
--- a/rhodecode/api/views/user_api.py
+++ b/rhodecode/api/views/user_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -232,10 +230,10 @@ def create_user(request, apiuser, userna
         raise JSONRPCForbidden()
 
     if UserModel().get_by_username(username):
-        raise JSONRPCError("user `%s` already exist" % (username,))
+        raise JSONRPCError("user `{}` already exist".format(username))
 
     if UserModel().get_by_email(email, case_insensitive=True):
-        raise JSONRPCError("email `%s` already exist" % (email,))
+        raise JSONRPCError("email `{}` already exist".format(email))
 
     # generate random password if we actually given the
     # extern_name and it's not rhodecode
@@ -305,7 +303,7 @@ def create_user(request, apiuser, userna
         }
     except Exception:
         log.exception('Error occurred during creation of user')
-        raise JSONRPCError('failed to create user `%s`' % (username,))
+        raise JSONRPCError('failed to create user `{}`'.format(username))
 
 
 @jsonrpc_method()
@@ -398,7 +396,7 @@ def update_user(request, apiuser, userid
             user=apiuser)
         Session().commit()
         return {
-            'msg': 'updated user ID:%s %s' % (user.user_id, user.username),
+            'msg': 'updated user ID:{} {}'.format(user.user_id, user.username),
             'user': user.get_api_data(include_secrets=True)
         }
     except DefaultUserException:
@@ -406,7 +404,7 @@ def update_user(request, apiuser, userid
         raise JSONRPCError('editing default user is forbidden')
     except Exception:
         log.exception("Error occurred during update of user")
-        raise JSONRPCError('failed to update user `%s`' % (userid,))
+        raise JSONRPCError('failed to update user `{}`'.format(userid))
 
 
 @jsonrpc_method()
@@ -467,13 +465,13 @@ def delete_user(request, apiuser, userid
 
         Session().commit()
         return {
-            'msg': 'deleted user ID:%s %s' % (user.user_id, user.username),
+            'msg': 'deleted user ID:{} {}'.format(user.user_id, user.username),
             'user': None
         }
     except Exception:
         log.exception("Error occurred during deleting of user")
         raise JSONRPCError(
-            'failed to delete user ID:%s %s' % (user.user_id, user.username))
+            'failed to delete user ID:{} {}'.format(user.user_id, user.username))
 
 
 @jsonrpc_method()
diff --git a/rhodecode/api/views/user_group_api.py b/rhodecode/api/views/user_group_api.py
--- a/rhodecode/api/views/user_group_api.py
+++ b/rhodecode/api/views/user_group_api.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2011-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
@@ -103,8 +101,8 @@ def get_user_group(request, apiuser, use
         _perms = ('usergroup.read', 'usergroup.write', 'usergroup.admin',)
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
-            raise JSONRPCError('user group `%s` does not exist' % (
-                usergroupid,))
+            raise JSONRPCError('user group `{}` does not exist'.format(
+                usergroupid))
 
     permissions = []
     for _user in user_group.permissions():
@@ -226,7 +224,7 @@ def create_user_group(
             raise JSONRPCForbidden()
 
     if UserGroupModel().get_by_name(group_name):
-        raise JSONRPCError("user group `%s` already exist" % (group_name,))
+        raise JSONRPCError("user group `{}` already exist".format(group_name))
 
     if isinstance(owner, Optional):
         owner = apiuser.user_id
@@ -279,7 +277,7 @@ def create_user_group(
         }
     except Exception:
         log.exception("Error occurred during creation of user group")
-        raise JSONRPCError('failed to create group `%s`' % (group_name,))
+        raise JSONRPCError('failed to create group `{}`'.format(group_name))
 
 
 @jsonrpc_method()
@@ -341,7 +339,7 @@ def update_user_group(request, apiuser, 
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
     else:
         include_secrets = True
 
@@ -374,7 +372,7 @@ def update_user_group(request, apiuser, 
             user=apiuser)
         Session().commit()
         return {
-            'msg': 'updated user group ID:%s %s' % (
+            'msg': 'updated user group ID:{} {}'.format(
                 user_group.users_group_id, user_group.users_group_name),
             'user_group': user_group.get_api_data(
                 include_secrets=include_secrets)
@@ -382,7 +380,7 @@ def update_user_group(request, apiuser, 
     except Exception:
         log.exception("Error occurred during update of user group")
         raise JSONRPCError(
-            'failed to update user group `%s`' % (usergroupid,))
+            'failed to update user group `{}`'.format(usergroupid))
 
 
 @jsonrpc_method()
@@ -431,7 +429,7 @@ def delete_user_group(request, apiuser, 
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     old_data = user_group.get_api_data()
     try:
@@ -441,7 +439,7 @@ def delete_user_group(request, apiuser, 
             user=apiuser)
         Session().commit()
         return {
-            'msg': 'deleted user group ID:%s %s' % (
+            'msg': 'deleted user group ID:{} {}'.format(
                 user_group.users_group_id, user_group.users_group_name),
             'user_group': None
         }
@@ -506,14 +504,14 @@ def add_user_to_user_group(request, apiu
         _perms = ('usergroup.admin',)
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
-            raise JSONRPCError('user group `%s` does not exist' % (
-                usergroupid,))
+            raise JSONRPCError('user group `{}` does not exist'.format(
+                usergroupid))
 
     old_values = user_group.get_api_data()
     try:
         ugm = UserGroupModel().add_user_to_group(user_group, user)
         success = True if ugm is not True else False
-        msg = 'added member `%s` to user group `%s`' % (
+        msg = 'added member `{}` to user group `{}`'.format(
             user.username, user_group.users_group_name
         )
         msg = msg if success else 'User is already in that group'
@@ -533,7 +531,7 @@ def add_user_to_user_group(request, apiu
     except Exception:
         log.exception("Error occurred during adding a member to user group")
         raise JSONRPCError(
-            'failed to add member to user group `%s`' % (
+            'failed to add member to user group `{}`'.format(
                 user_group.users_group_name,
             )
         )
@@ -579,12 +577,12 @@ def remove_user_from_user_group(request,
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     old_values = user_group.get_api_data()
     try:
         success = UserGroupModel().remove_user_from_group(user_group, user)
-        msg = 'removed member `%s` from user group `%s`' % (
+        msg = 'removed member `{}` from user group `{}`'.format(
             user.username, user_group.users_group_name
         )
         msg = msg if success else "User wasn't in group"
@@ -600,7 +598,7 @@ def remove_user_from_user_group(request,
     except Exception:
         log.exception("Error occurred during removing an member from user group")
         raise JSONRPCError(
-            'failed to remove member from user group `%s`' % (
+            'failed to remove member from user group `{}`'.format(
                 user_group.users_group_name,
             )
         )
@@ -641,7 +639,7 @@ def grant_user_permission_to_user_group(
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     user = get_user_or_error(userid)
     perm = get_perm_or_error(perm, prefix='usergroup.')
@@ -663,7 +661,7 @@ def grant_user_permission_to_user_group(
 
         return {
             'msg':
-                'Granted perm: `%s` for user: `%s` in user group: `%s`' % (
+                'Granted perm: `{}` for user: `{}` in user group: `{}`'.format(
                     perm.permission_name, user.username,
                     user_group.users_group_name
                 ),
@@ -713,7 +711,7 @@ def revoke_user_permission_from_user_gro
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (usergroupid,))
+                'user group `{}` does not exist'.format(usergroupid))
 
     user = get_user_or_error(userid)
 
@@ -732,7 +730,7 @@ def revoke_user_permission_from_user_gro
         PermissionModel().flush_user_permission_caches(changes)
 
         return {
-            'msg': 'Revoked perm for user: `%s` in user group: `%s`' % (
+            'msg': 'Revoked perm for user: `{}` in user group: `{}`'.format(
                 user.username, user_group.users_group_name
             ),
             'success': True
@@ -784,14 +782,14 @@ def grant_user_group_permission_to_user_
                 user=apiuser,
                 user_group_name=target_user_group.users_group_name):
             raise JSONRPCError(
-                'to user group `%s` does not exist' % (usergroupid,))
+                'to user group `{}` does not exist'.format(usergroupid))
 
         # check if we have at least read permission for source user group !
         _perms = ('usergroup.read', 'usergroup.write', 'usergroup.admin',)
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (sourceusergroupid,))
+                'user group `{}` does not exist'.format(sourceusergroupid))
 
     try:
         changes = UserGroupModel().grant_user_group_permission(
@@ -864,7 +862,7 @@ def revoke_user_group_permission_from_us
                 user=apiuser,
                 user_group_name=target_user_group.users_group_name):
             raise JSONRPCError(
-                'to user group `%s` does not exist' % (usergroupid,))
+                'to user group `{}` does not exist'.format(usergroupid))
 
         # check if we have at least read permission
         # for the source user group !
@@ -872,7 +870,7 @@ def revoke_user_group_permission_from_us
         if not HasUserGroupPermissionAnyApi(*_perms)(
                 user=apiuser, user_group_name=user_group.users_group_name):
             raise JSONRPCError(
-                'user group `%s` does not exist' % (sourceusergroupid,))
+                'user group `{}` does not exist'.format(sourceusergroupid))
 
     try:
         changes = UserGroupModel().revoke_user_group_permission(
diff --git a/rhodecode/lib/vcs/geventcurl.py b/rhodecode/lib/vcs/geventcurl.py
--- a/rhodecode/lib/vcs/geventcurl.py
+++ b/rhodecode/lib/vcs/geventcurl.py
@@ -187,7 +187,7 @@ class GeventCurlMulti(object):
             for curl in ok_list:
                 curl.waiter.switch(None)
             for curl, errnum, errmsg in err_list:
-                curl.waiter.throw(Exception('%s %s' % (errnum, errmsg)))
+                curl.waiter.throw(Exception('{} {}'.format(errnum, errmsg)))
             if num_q == 0:
                 break
 
diff --git a/rhodecode/lib/vcs/nodes.py b/rhodecode/lib/vcs/nodes.py
--- a/rhodecode/lib/vcs/nodes.py
+++ b/rhodecode/lib/vcs/nodes.py
@@ -1,5 +1,3 @@
-
-
 # Copyright (C) 2014-2023 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify