Hopefully final pre-commit fixes

docs/conf.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Configuration file for the Sphinx documentation builder.
 #
 # For the full list of built-in configuration values, see the documentation:
@@ -14,23 +15,22 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
 extensions = [
-    "myst_parser",
+    'myst_parser',
     # "autodoc2",
     # "sphinx.ext.intersphinx",
     # "sphinx.ext.viewcode",
     # "sphinx.ext.autodoc",
     # "sphinx.ext.autosummary",
-    "sphinx_design",
-    "sphinx_copybutton",
+    'sphinx_design',
+    'sphinx_copybutton',
 ]
 
 templates_path = ['_templates']
 exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
 
 
-
 # -- Options for HTML output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output
 
-html_theme = "sphinx_book_theme"
+html_theme = 'sphinx_book_theme'
 html_static_path = ['_static']

src/qe_tools/outputs/base.py

@@ -10,7 +10,7 @@ class BaseOutput(abc.ABC):
     Abstract class for the outputs of Quantum ESPRESSO.
     """
 
-    def __init__(self, outputs: Union[dict, None] = None, executable: str | None = None):
+    def __init__(self, outputs: Union[dict, None] = None, executable: Union[str, None] = None):
         self.outputs = outputs
         self.executable = executable