Apply suggestion to soitool/database.py

soitool/database.py

@@ -184,7 +184,7 @@ class Database:
         codes = soitool.coder.get_code_set(number_of_entries, code_len)
         # Statement for update
         stmt = "UPDATE CodeBook SET Code = ?"
-        # Wiping Code column because of UNIQUE
+        # Inserting NULL into Code column because of UNIQUE constraint
         self.conn.execute(stmt, (None,))
         # Fill Code column with new codes
         stmt = stmt + "WHERE Word = ?"