Fix lint errors

src/registrar/admin.py

@@ -15,8 +15,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.urls import reverse
 from dateutil.relativedelta import relativedelta  # type: ignore
 from epplibwrapper.errors import ErrorCode, RegistryError
-from registrar.models import Contact, Domain, DomainRequest, DraftDomain, User, Website, FederalAgency
-from registrar.utility import csv_export
+from registrar.models import Contact, Domain, DomainRequest, DraftDomain, User, Website
 from registrar.utility.errors import FSMApplicationError, FSMErrorCodes
 from registrar.views.utility.mixins import OrderableFieldsMixin
 from django.contrib.admin.views.main import ORDER_VAR
@@ -1789,6 +1788,7 @@ class VerifiedByStaffAdmin(ListHeaderAdmin):
         obj.requestor = request.user if request.user.is_authenticated else None
         super().save_model(request, obj, form, change)
 
+
 class FederalAgencyAdmin(ListHeaderAdmin):
     list_display = ["agency"]
     search_fields = ["agency"]

src/registrar/migrations/0077_federalagency.py

@@ -6,10 +6,12 @@ from django.db import migrations, models
 from registrar.models import FederalAgency
 from typing import Any
 
+
 # For linting: RunPython expects a function reference.
 def create_federal_agencies(apps, schema_editor) -> Any:
     FederalAgency.create_federal_agencies(apps, schema_editor)
 
+
 class Migration(migrations.Migration):
 
     dependencies = [

src/registrar/models/federal_agency.py

@@ -18,7 +18,7 @@ class FederalAgency(TimeStampedModel):
     )
 
     def __str__(self) -> str:
-        return self.agency
+        return f"{self.agency}"
 
     # TODO: Update parameters to put in
     def create_federal_agencies(apps, schema_editor):