adds comments

Author: CarlosCoelhoSL

digital_land/expectations/operation.py

@@ -189,10 +189,13 @@ def count_deleted_entities(
 
 
 def check_columns(conn, expected: dict):
+    # This operation checks that the db connection provided contains the tables with the expected columns provided
+
+    # expected: a dictionary containing table names as keys, with a list of their expected columns as the value
+
     details = []
     success_count = 0
     failure_count = 0
-    # expected: a dictionary containing table names as keys, with their a list of their expected columns as the value
     for k, v in expected.items():
         table_name = k
         expected_columns = v