Run ruff check . --fix

app/main/views/templates.py

@@ -42,27 +42,26 @@
 from app.main import main, no_cookie
 from app.main.forms import (
     CopyTemplateForm,
+    EmailAttachmentForm,
     EmailTemplateForm,
     FieldWithNoneOption,
     LetterTemplateForm,
     LetterTemplateLanguagesForm,
     LetterTemplatePostageForm,
+    OnOffSettingForm,
     PDFUploadForm,
     RenameTemplateForm,
     SearchTemplatesForm,
+    SetServiceAttachmentDataRetentionForm,
     SetTemplateSenderForm,
     SMSTemplateForm,
     TemplateAndFoldersSelectionForm,
     TemplateFolderForm,
     WelshLetterTemplateForm,
-    EmailAttachmentForm,
-    SetServiceAttachmentDataRetentionForm,
-    OnOffSettingForm,
 )
 from app.main.views.send import get_sender_details
 from app.models.service import Service
 from app.models.template_list import TemplateList, UserTemplateList, UserTemplateLists
-from app.models.template_attachment import TemplateAttachments
 from app.s3_client.s3_letter_upload_client import (
     backup_original_letter_to_s3,
     get_attachment_pdf_and_metadata,

app/models/template_attachment.py

@@ -1,7 +1,7 @@
 import base64
 import json
 
-from notifications_utils.insensitive_dict import InsensitiveDict, InsensitiveSet
+from notifications_utils.insensitive_dict import InsensitiveDict
 
 from app.extensions import redis_client
 from app.models import JSONModel

app/utils/templates.py

@@ -3,18 +3,18 @@
 
 from flask import current_app, render_template, url_for
 from markupsafe import Markup
-from ordered_set import OrderedSet
 from notifications_utils.countries import Postage
-from notifications_utils.insensitive_dict import InsensitiveDict
 from notifications_utils.field import Field
 from notifications_utils.formatters import escape_html, formatted_list, normalise_whitespace
+from notifications_utils.insensitive_dict import InsensitiveDict
 from notifications_utils.take import Take
 from notifications_utils.template import (
     BaseEmailTemplate,
     BaseLetterTemplate,
     SMSPreviewTemplate,
     do_nice_typography,
 )
+from ordered_set import OrderedSet
 from werkzeug.utils import cached_property
 
 from app.extensions import redis_client
@@ -302,11 +302,11 @@ def all_placeholders(self):
     @property
     def placeholders(self):
         return OrderedSet(
-            (
+
                 placeholder
                 for placeholder in self.all_placeholders
                 if InsensitiveDict.make_key(placeholder) not in self.attachments.as_personalisation.keys()
-            )
+
         )