Remove the Sphinx static CSS copy workaround

.gitignore

@@ -59,10 +59,6 @@ temp/
 
 .flake8
 
-# pending: Sphinx 8.1.4 + deps are verified as working with Arcade
-# see util/sphinx_static_file_temp_fix.py
-.ENABLE_DEVMACHINE_SPHINX_STATIC_FIX
-
 webplayground/**/*.whl
 webplayground/**/*.zip
 .claude/skills/*

CHANGELOG.md

@@ -56,6 +56,7 @@ Arcade [PyPi Release History](https://pypi.org/project/arcade/#history) page.
 - Added `arcade.sweep_line(start, end, sprite_list)`, which returns a `SweepInfo` for the first sprite a line hits (its `fraction`, `distance`, and surface `normal`), or `None`. It's `sweep_sprite` for a point: for lasers, hitscan weapons, or seeing what's in the way. Added the `sprite_laser_mirrors` example, where a laser bounces off rotating mirrors using the normal.
 
 ### Misc Changes
+- Removed the docs build's workaround for Sphinx not copying changed CSS files (`util/sphinx_static_file_temp_fix.py` and its `.ENABLE_DEVMACHINE_SPHINX_STATIC_FIX` switch). Sphinx fixed it upstream, and the pinned Sphinx 9.1.0 copies changed CSS on incremental builds and with `make.py serve` ([#2266](https://github.com/pythonarcade/arcade/issues/2266)).
 - Docs fixes:
   - The install guide, SBC guide and contributing guide said Arcade needs Python 3.9; it needs 3.10. The release checklist now lists everywhere the minimum version appears ([#1302](https://github.com/pythonarcade/arcade/issues/1302)).
   - `ShapeElementList`'s docstring links to `pyglet.shapes`, and says "batch" where it said "back" ([#2608](https://github.com/pythonarcade/arcade/issues/2608)).

doc/conf.py

@@ -123,10 +123,6 @@ def run_util(filename, run_name="__main__", init_globals=None):
     runpy.run_path(full_str, **kwargs)
 
 
-# Temp fix for Sphinx not copying static files  # pending: post-3.0 refactor
-# Enable by creating a .ENABLE_DEVMACHINE_SPHINX_STATIC_FIX
-run_util("sphinx_static_file_temp_fix.py")
-
 # Make thumbnails for the example code screenshots
 run_util("generate_example_thumbnails.py")
 # Create a tabular representation of the resources with embeds
@@ -523,7 +519,6 @@ def setup(app):
             log.info(f"    {comment}")
 
     # Separate stylesheets loosely by category.
-    # pending:  sphinx >= 8.1.4 to remove the sphinx_static_file_temp_fix.py
     app.add_css_file("css/colors.css")
     app.add_css_file("css/layout.css")
     app.add_css_file("css/custom.css")