Adjust package data list formatting

setup.py

@@ -88,7 +88,11 @@ setup(
         "xfel_calibrate.notebooks": "xfel_calibrate/notebooks",
     },
     package_data={
-        "xfel_calibrate": ["bin/*.sh"] + data_files + ["titlepage.tmpl", "xfel.pdf"]
+        "xfel_calibrate": [
+            "bin/*.sh",
+            "titlepage.tmpl",
+            "xfel.pdf",
+        ] + data_files
     },
     entry_points={
         "console_scripts": [