Cleanup: double quotes for strings, replace f-string with str.format

scripts/templates_py/external_script_stub.py

@@ -9,5 +9,5 @@ filename = "my_script.py"
 
 filepath = os.path.join(os.path.dirname(bpy.data.filepath), filename)
 global_namespace = {"__file__": filepath, "__name__": "__main__"}
-with open(filepath, 'rb') as file:
+with open(filepath, "rb") as file:
     exec(compile(file.read(), filepath, 'exec'), global_namespace)

scripts/templates_py/operator_file_export.py

@@ -3,7 +3,7 @@ import bpy
 
 def write_some_data(context, filepath, use_some_setting):
     print("running write_some_data...")
-    f = open(filepath, 'w', encoding='utf-8')
+    f = open(filepath, "w", encoding='utf-8')
     f.write("Hello World {:s}".format(use_some_setting))
     f.close()
 

scripts/templates_py/operator_file_import.py

@@ -3,7 +3,7 @@ import bpy
 
 def read_some_data(context, filepath, use_some_setting):
     print("running read_some_data...")
-    f = open(filepath, 'r', encoding='utf-8')
+    f = open(filepath, "r", encoding="utf-8")
     data = f.read()
     f.close()
 

scripts/templates_py/ui_previews_custom_icon.py

@@ -11,7 +11,7 @@
 # - provide a fixed list of previews to select from
 # - provide a dynamic list of preview (eg. calculated from reading a directory)
 #
-# For the above use cases, see the template 'ui_previews_dynamic_enum.py"
+# For the above use cases, see the template `ui_previews_dynamic_enum.py`.
 
 
 import os