removes all lines consisting only of spaces

this really bothers me for some reason - nothing technical

InvenTree/barcodes/api.py

@@ -73,7 +73,7 @@ class BarcodeScan(APIView):
 
         # A plugin has been found!
         if plugin is not None:
-            
+
             # Try to associate with a stock item
             item = plugin.getStockItem()
 
@@ -133,7 +133,7 @@ class BarcodeScan(APIView):
 class BarcodeAssign(APIView):
     """
     Endpoint for assigning a barcode to a stock item.
-    
+
     - This only works if the barcode is not already associated with an object in the database
     - If the barcode does not match an object, then the barcode hash is assigned to the StockItem
     """
@@ -178,7 +178,7 @@ class BarcodeAssign(APIView):
 
         # Matching plugin was found
         if plugin is not None:
-            
+
             hash = plugin.hash()
             response['hash'] = hash
             response['plugin'] = plugin.name
@@ -234,7 +234,7 @@ class BarcodeAssign(APIView):
 barcode_api_urls = [
 
     url(r'^link/$', BarcodeAssign.as_view(), name='api-barcode-link'),
-    
+
     # Catch-all performs barcode 'scan'
     url(r'^.*$', BarcodeScan.as_view(), name='api-barcode-scan'),
 ]

InvenTree/barcodes/barcode.py

@@ -21,7 +21,7 @@ def hash_barcode(barcode_data):
 
     HACK: Remove any 'non printable' characters from the hash,
           as it seems browers will remove special control characters...
-        
+
     TODO: Work out a way around this!
     """
 

InvenTree/barcodes/tests.py

@@ -92,7 +92,7 @@ class BarcodeAPITest(APITestCase):
         data = response.data
 
         self.assertEqual(response.status_code, status.HTTP_200_OK)
-    
+
         self.assertIn('stockitem', data)
 
         pk = data['stockitem']['pk']
@@ -121,7 +121,7 @@ class BarcodeAPITest(APITestCase):
         data = response.data
 
         self.assertEqual(response.status_code, status.HTTP_200_OK)
-        
+
         self.assertIn('success', data)
 
         hash = data['hash']