Add ruff pre-commit and reformat files with it

Alternative to #151 which adds flake8

Author: Carreau

.pre-commit-config.yaml

@@ -4,4 +4,13 @@ repos:
   hooks:
   - id: prettier
     types_or: [css, javascript]
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  # Ruff version.
+  rev: v0.3.4
+  hooks:
+    # Run the linter.
+    - id: ruff
+      args: [ --fix ]
+    # Run the formatter.
+    - id: ruff-format
 

docs/conf.py

@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 
 extensions = [
-    'sphinx.ext.mathjax',
-    'jupyterlite_sphinx',
-    'myst_parser',
+    "sphinx.ext.mathjax",
+    "jupyterlite_sphinx",
+    "myst_parser",
 ]
 
 html_theme = "pydata_sphinx_theme"
@@ -12,10 +12,10 @@
 jupyterlite_contents = "./custom_contents"
 jupyterlite_bind_ipynb_suffix = False
 
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = 'JupyterLite Sphinx extension'
+project = "JupyterLite Sphinx extension"
 
 # theme configuration
 html_theme_options = {

jupyterlite_sphinx/jupyterlite_sphinx.py

@@ -410,9 +410,9 @@ def run(self):
             self.content = None
             notebooks_dir = Path(self.env.app.srcdir) / CONTENT_DIR
             notebook_unique_name = f"{uuid4()}.ipynb".replace("-", "_")
-            self.env.temp_data["generated_notebooks"][
-                directive_key
-            ] = notebook_unique_name
+            self.env.temp_data["generated_notebooks"][directive_key] = (
+                notebook_unique_name
+            )
             # Copy the Notebook for NotebookLite to find
             os.makedirs(notebooks_dir, exist_ok=True)
             with open(notebooks_dir / Path(notebook_unique_name), "w") as f: