diff --git a/erpnext/controllers/status_updater.py b/erpnext/controllers/status_updater.py
index 4d0520a..de76e45 100644
--- a/erpnext/controllers/status_updater.py
+++ b/erpnext/controllers/status_updater.py
@@ -69,16 +69,16 @@
 		["Cancelled", "eval:self.docstatus==2"],
 		["Closed", "eval:self.status=='Closed'"],
 	],
-	"Purchase Invoice": [	
-		["Draft", None],	
-		["Submitted", "eval:self.docstatus==1"],	
-		["Paid", "eval:self.outstanding_amount==0 and self.docstatus==1"],	
-		["Return", "eval:self.is_return==1 and self.docstatus==1"],	
-		["Debit Note Issued",	
-			"eval:self.outstanding_amount <= 0 and self.docstatus==1 and self.is_return==0 and get_value('Purchase Invoice', {'is_return': 1, 'return_against': self.name, 'docstatus': 1})"],	
-		["Unpaid", "eval:self.outstanding_amount > 0 and getdate(self.due_date) >= getdate(nowdate()) and self.docstatus==1"],	
-		["Overdue", "eval:self.outstanding_amount > 0 and getdate(self.due_date) < getdate(nowdate()) and self.docstatus==1"],	
-		["Cancelled", "eval:self.docstatus==2"],	
+	"Purchase Invoice": [
+		["Draft", None],
+		["Submitted", "eval:self.docstatus==1"],
+		["Paid", "eval:self.outstanding_amount==0 and self.docstatus==1"],
+		["Return", "eval:self.is_return==1 and self.docstatus==1"],
+		["Debit Note Issued",
+			"eval:self.outstanding_amount <= 0 and self.docstatus==1 and self.is_return==0 and get_value('Purchase Invoice', {'is_return': 1, 'return_against': self.name, 'docstatus': 1})"],
+		["Unpaid", "eval:self.outstanding_amount > 0 and getdate(self.due_date) >= getdate(nowdate()) and self.docstatus==1"],
+		["Overdue", "eval:self.outstanding_amount > 0 and getdate(self.due_date) < getdate(nowdate()) and self.docstatus==1"],
+		["Cancelled", "eval:self.docstatus==2"],
 	],
 	"Material Request": [
 		["Draft", None],