Activate isort linter

btest

@@ -29,7 +29,6 @@ import threading
 import time
 import uuid
 import xml.dom.minidom
-
 from datetime import datetime
 
 # We require the external multiprocess library on Windows due to pickling issues

pyproject.toml

@@ -72,4 +72,4 @@ per-file-ignores = """
 """
 
 [tool.ruff.lint]
-select = ["C4", "COM", "F", "UP"]
+select = ["C4", "COM", "F", "I", "UP"]

sphinx/btest-sphinx.py

@@ -1,15 +1,16 @@
 import os
 import os.path
-import subprocess
 import re
+import subprocess
 
 from docutils import nodes, utils
-from docutils.parsers.rst import directives, Directive, Parser
+from docutils.parsers.rst import Directive, Parser, directives
 from docutils.transforms import Transform
-from sphinx.util.console import darkgreen, red
-from sphinx.errors import SphinxError
+
 from sphinx.directives.code import LiteralInclude
+from sphinx.errors import SphinxError
 from sphinx.util import logging
+from sphinx.util.console import darkgreen, red
 
 logger = logging.getLogger(__name__)