Assignment 2 - Minor change on printed out getHistory

Hi students,

There is a minor change that needed in printed out format of getHistory. The order should start from order_counter - executed_list.size instead of order_counter.

The description should be as following:

In getHistory command, the executed_order printed out should start from order_counter - executed_list.size meanwhile there is no order number for the outstanding_collection. Ex:

                 executed_list=(¡°deposit 100¡±, ¡°addInterest 10¡±); 

                 outstanding_collection=(¡°deposit -50¡±, ¡°addInterest 5¡±);

                 order_counter=5;

                 getHistory result:

                 Executed_list

                 3. deposit 100

                 4. addInterest 10