message: Use log instead of println in tests
diff: @@ -593,7 +593,7 @@ mod test {
  ) -> Result<Option<String>, failure::Error> {
  assert_success(path, web)?;
  let data = web.get(path).send()?.text()?;
  - println!("fetched path {} and got content {}", path, data);
  + log::info!("fetched path {} and got content {}", path, data);
  let dom = kuchiki::parse_html().one(data);
  if let Some(elem) = dom
  