diff --git a/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py b/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py
index d8f893c..b3d9c15 100644
--- a/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py
+++ b/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py
@@ -318,13 +318,16 @@
 	pos_return_docs = [frappe.get_cached_doc("POS Invoice", d.pos_invoice) for d in invoices if d.is_return and d.return_against]
 	for pos_invoice in pos_return_docs:
 		for item in pos_invoice.items:
-			if not item.serial_no: continue
+			if not item.serial_no:
+				continue
 
 			return_against_is_added = any(d for d in _invoices if d.pos_invoice == pos_invoice.return_against)
-			if return_against_is_added: break
+			if return_against_is_added:
+				break
 
 			return_against_is_consolidated = frappe.db.get_value('POS Invoice', pos_invoice.return_against, 'status', cache=True) == 'Consolidated'
-			if return_against_is_consolidated: break
+			if return_against_is_consolidated:
+				break
 
 			pos_invoice_row = [d for d in invoices if d.pos_invoice == pos_invoice.return_against]
 			_invoices.append(pos_invoice_row)
diff --git a/erpnext/stock/doctype/serial_no/serial_no.py b/erpnext/stock/doctype/serial_no/serial_no.py
index 66c7707..2808c21 100644
--- a/erpnext/stock/doctype/serial_no/serial_no.py
+++ b/erpnext/stock/doctype/serial_no/serial_no.py
@@ -619,14 +619,9 @@
 
 	SerialNo = frappe.qb.DocType("Serial No")
 	serial_nos = get_serial_nos(serial_nos)
-	query = (
-		frappe.qb
-			.from_(SerialNo)
-			.select(SerialNo.name)
-			.where(
-				(SerialNo.name.isin(serial_nos))
-				& (Coalesce(SerialNo.delivery_document_type, "") != "")
-			)
+	query = frappe.qb.select(SerialNo.name).from_(SerialNo).where(
+		(SerialNo.name.isin(serial_nos))
+		& (Coalesce(SerialNo.delivery_document_type, "") != "")
 	)
 
 	result = query.run()