style: format code with black
diff --git a/erpnext/controllers/tests/test_mapper.py b/erpnext/controllers/tests/test_mapper.py
index e755876..919bcda 100644
--- a/erpnext/controllers/tests/test_mapper.py
+++ b/erpnext/controllers/tests/test_mapper.py
@@ -10,14 +10,14 @@
 
 class TestMapper(unittest.TestCase):
 	def test_map_docs(self):
-		'''Test mapping of multiple source docs on a single target doc'''
+		"""Test mapping of multiple source docs on a single target doc"""
 
 		make_test_records("Item")
-		items = ['_Test Item', '_Test Item 2', '_Test FG Item']
+		items = ["_Test Item", "_Test Item 2", "_Test FG Item"]
 
 		# Make source docs (quotations) and a target doc (sales order)
-		qtn1, item_list_1 = self.make_quotation(items, '_Test Customer')
-		qtn2, item_list_2 = self.make_quotation(items, '_Test Customer')
+		qtn1, item_list_1 = self.make_quotation(items, "_Test Customer")
+		qtn2, item_list_2 = self.make_quotation(items, "_Test Customer")
 		so, item_list_3 = self.make_sales_order()
 
 		# Map source docs to target with corresponding mapper method
@@ -26,20 +26,20 @@
 
 		# Assert that all inserted items are present in updated sales order
 		src_items = item_list_1 + item_list_2 + item_list_3
-		self.assertEqual(set(d for d in src_items),
-			set(d.item_code for d in updated_so.items))
-
+		self.assertEqual(set(d for d in src_items), set(d.item_code for d in updated_so.items))
 
 	def make_quotation(self, item_list, customer):
 
-		qtn = frappe.get_doc({
-			"doctype": "Quotation",
-			"quotation_to": "Customer",
-			"party_name": customer,
-			"order_type": "Sales",
-			"transaction_date" : nowdate(),
-			"valid_till" : add_months(nowdate(), 1)
-		})
+		qtn = frappe.get_doc(
+			{
+				"doctype": "Quotation",
+				"quotation_to": "Customer",
+				"party_name": customer,
+				"order_type": "Sales",
+				"transaction_date": nowdate(),
+				"valid_till": add_months(nowdate(), 1),
+			}
+		)
 		for item in item_list:
 			qtn.append("items", {"qty": "2", "item_code": item})
 
@@ -47,21 +47,23 @@
 		return qtn, item_list
 
 	def make_sales_order(self):
-		item = frappe.get_doc({
-			"base_amount": 1000.0,
-			"base_rate": 100.0,
-			"description": "CPU",
-			"doctype": "Sales Order Item",
-			"item_code": "_Test Item",
-			"item_name": "CPU",
-			"parentfield": "items",
-			"qty": 10.0,
-			"rate": 100.0,
-			"warehouse": "_Test Warehouse - _TC",
-			"stock_uom": "_Test UOM",
-			"conversion_factor": 1.0,
-			"uom": "_Test UOM"
-		})
-		so = frappe.get_doc(frappe.get_test_records('Sales Order')[0])
+		item = frappe.get_doc(
+			{
+				"base_amount": 1000.0,
+				"base_rate": 100.0,
+				"description": "CPU",
+				"doctype": "Sales Order Item",
+				"item_code": "_Test Item",
+				"item_name": "CPU",
+				"parentfield": "items",
+				"qty": 10.0,
+				"rate": 100.0,
+				"warehouse": "_Test Warehouse - _TC",
+				"stock_uom": "_Test UOM",
+				"conversion_factor": 1.0,
+				"uom": "_Test UOM",
+			}
+		)
+		so = frappe.get_doc(frappe.get_test_records("Sales Order")[0])
 		so.insert(ignore_permissions=True)
 		return so, [item.item_code]