I certainly hope that is a false news, as being dissolved in acid should be one of the most fucked up deaths there is
well, in hydrofluoricacid it might not be tooooo bad (although that stuff is a nightmare), as it destroys the nerves in the skin very quickly (> not much pain) and within a few minutes the fluor that entered the bloodstream should lead to death by multiple organ failure
other acids might not kill you for hours while you feel and see your body turning into goo