message: and i oop (fix bad call to format_err)
diff: @@ -116,11 +116,11 @@ pub fn validate_file_uploads(pairs: Vec<KeyValuePair>) -> Result<(), failure::Er
  );
  }
  if pair.value.len() > VALUE_MAX_SIZE {
  - format_err(
  + failure::bail!(
  "File `{}` exceeds the maximum value size limit of {} bytes",
  pair.key,
  VALUE_MAX_SIZE
  - )
  + );
  }
  }
  Ok(())
  