Proper translation for gender-related messages

gistfile1.mustache

{% load i18n %}

{% if u.sex == 'm' %}
    {% blocktrans with u.get_full_name as male %}
        {{ male }} set up us a bomb.
    {% endblocktrans %}
{% else %}
    {% blocktrans with u.get_full_name as female %}
        {{ female }} set up us a bomb.
    {% endblocktrans %}
{% endif %}