diff --git a/docs/source/conf.py b/docs/source/conf.py
index 5a685277..eb39ffc5 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -206,8 +206,7 @@
 # path to .pyi files w/o having them installed
 src_path = "../../src/amrex"
 dst_path = os.path.join(
-    os.path.dirname(os.path.abspath(__file__)),
-    "_static/pyapi/amrex"
+    os.path.dirname(os.path.abspath(__file__)), "_static/pyapi/amrex"
 )
 if os.path.exists(dst_path) and os.path.isdir(dst_path):
     shutil.rmtree(dst_path)
@@ -215,14 +214,13 @@
 
 for subdir, dirs, files in os.walk(dst_path):
     for f in files:
-        if f.find('.pyi') > 0:
+        if f.find(".pyi") > 0:
             dir_path = os.path.relpath(subdir, dst_path)
             old_path = os.path.join(dir_path, f)
-            new_path = old_path.replace(".pyi",   ".py")
+            new_path = old_path.replace(".pyi", ".py")
             print(f"old_path={old_path}, new_path={new_path}")
             os.replace(
-                os.path.join(dst_path, old_path),
-                os.path.join(dst_path, new_path)
+                os.path.join(dst_path, old_path), os.path.join(dst_path, new_path)
             )
 
 # insert into PYTHONPATH