healthchecks/templates/emails/summary-text.html

{% load humanize hc_extras %}
 Status | Name                                     | Last Ping
--------+------------------------------------------+-----------------------{% for check in checks %}
 {{ check.get_status|ljust:"6" }} | {{ check.name|default:'unnamed'|ljust:"40" }} | {% if check.last_ping %}{{ check.last_ping|naturaltime }}{% else %}Never{% endif %}{% endfor %}