[template]
The template is used by Python str.format to generate each advert.
It can contain the following fields, delimited by braces ('{' and '}').

  source_title   title of the web feed
  source_link    URL to the feed's website
  title          title of the feed item
  link           URL to the item
  time           publication time
  summary        truncated content or description

The publication time is a Python datetime.datetime object,
which supports at least C89 format codes, e.g. {time:%Y-%m-%d}.

[examples]
Given the these URLs in a feeds file:

  https://adol.pw/index.xml
  https://cnx.gdn/feed.xml
  https://xrvs.net/index.xml

Advertisement of the two latest blogs among them, along with articles
by Drew DeVault, can be generated via the following command.

  echo "<article>
    <h3><a href='{link}'>{title}</a></h3>
    {summary}&mdash;<a href='{source_link}'>{source_title}</a>, {time:%F}
  </article>" | fead -F feeds -f https://drewdevault.com/blog/index.xml -n 2

[reporting bugs]
Issues should be reported to <~cnx/misc@lists.sr.ht>.

[see also]
python(1), strftime(3)