message: fix: swap lost and gained motifs
diff: @@ -45,10 +45,10 @@ fn find_aa_motifs_changes_one(motifs_ref: &[AaMotif], motifs_qry: &[AaMotif]) ->
  let motifs_qry: HashSet<AaMotifWithoutSeq> = motifs_qry.iter().cloned().map(AaMotifWithoutSeq::from).collect();
  // Gained motifs: not present in ref, present in qry
  - let gained: Vec<AaMotif> = cloned_into(motifs_ref.difference(&motifs_qry)).sorted().collect_vec();
  + let gained: Vec<AaMotif> = cloned_into(motifs_qry.difference(&motifs_ref)).sorted().collect_vec();
  // Lost motifs: present in ref, not present in query
  - let lost: Vec<AaMotif> = cloned_into(motifs_qry.difference(&motifs_ref)).sorted().collect_vec();
  + let lost: Vec<AaMotif> = cloned_into(motifs_ref.difference(&motifs_qry)).sorted().collect_vec();
  // Kept motifs: present in ref and qry
  let kept = {
  