Argentina in democracy has continued to assert their sovereign rights over the Malvinas Islands via diplomatic means. You are fully entitled to believe the claim is invalid or wrong, but this that not make it sabre-rattling. Sabre-rattling is making veiled threats of invasion, suspicious missile tests, flybys by military aircraft, and in general any display of military power.
If by sabre-rattling you merely mean "Argentina continues to complain about the issue using strong language and tries to bring it to international courts", then that's a pretty misleading wording.
Which Argentina, particularly by way of its Navy, has been engaging throughout the 2010s over the Falkland Islands.
> Argentina in democracy has continued to assert their sovereign rights over the Malvinas Islands via diplomatic means.
Among other things, enforcing a de facto blockade using naval forces to prevent innocent passage of civilian vessels is -- as well as arguably a violation of the UN Convention on the Law of the Sea -- clear saber rattling, not "diplomatic means".
> You are fully entitled to believe the claim is invalid or wrong, but this that not make it sabre-rattling.
You are fully entitled to believe that the claim is valid or right, but that doesn't change the fact that the Kirchener government has been, for years, engaging in, alongside diplomatic efforts, saber rattling in regards to the Falkland Islands.
No, it has continued as recently as this year (actually, its been on a notable upswing in the last couple of years, and a similar upswing happened, IIRC, in the early-to-mid-1990s.) Its true that it reached a fever pitch and an actual brief war with the UK in the time you describe, but the sabre rattling didn't end there.