Filter all code over pyupgrade --py38-plus and ruff (#235)

* filter all code over `pyupgrade --py38-plus`

Signed-off-by: Tomasz Kłoczko <[email protected]>

* filter all code over ruff

Signed-off-by: Tomasz Kłoczko <[email protected]>

---------

Signed-off-by: Tomasz Kłoczko <[email protected]>

Author: kloczek

docs/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # Configuration file for the Sphinx documentation builder.
 #

tests/test_urls.py

@@ -3,7 +3,6 @@
 import sphinx
 import shutil
 import subprocess
-import warnings
 
 from utils import _get_css_html_link_tag, _get_js_html_link_tag
 
@@ -328,7 +327,7 @@ def test_image_looks_like_absolute_url(app, status, warning):
 def test_image_absolute_url(app, status, warning):
     app.build()
     path = app.outdir / '404.html'
-    assert path.exists() == True
+    assert path.exists() is True
     content = open(path).read()
 
     chunks = [