fixes warning:
[WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}.
in etckeeper role: `Found: email_configured.stdout != "{{etckeeper_user_email}}"
by default, etckeeper will be configured so that auto commits are on (etckeeper
default). if avoid_autocommits is true, etckeeper will be configured to avoid
autocommits (daily or before package manager runs).