Membership receipts do not display Credit Card information

From https://issues.civicrm.org/jira/browse/CRM-18027 (also https://civicrm.stackexchange.com/questions/15150)

Most of the issues mentioned there seem to be solved in 5.8.1, however, Credit Card information is still not showing up (and leaving strange blanks in the email).

To reproduce issue:

1. Register as a new, paying, member, using Credit Card
2. Read the e-mail sent as 'Receipt - Membership signup'

Details

In the system template "Memberships - Receipt (on-line)", in the latest default,

where the source, in the text version, says

===========================================================
{ts}Credit Card Information{/ts}

===========================================================
{$credit_card_type}
{$credit_card_number}
{ts}Expires{/ts}: {$credit_card_exp_date|truncate:7:''|crmDate}
{/if}

the generated output is

===========================================================
Credit Card Information
===========================================================


Expires: 

The HTML version and the PDF have the same problem.