Developer API Explorer Financial Item displays wrong parameter for Currency

Here are the steps to see the problem:

1. Enter the API explorer.
2. Choose the FinancialItem entity
3. Change the action to create
4. For the parameter, select Financial Item Currency
5. In the select, choose US Dollar

In the example code, it shows that currency should be 840. However, if you use this, you get a 'Currency not a valid code' error. Looking at the civicrm_financial_item table showed me that the currency name, not its numeric code is used. So the API should use USD instead.