I've noticed designers using "..." at the end of inputs or search bars placeholders ("Enter your email address" vs "Enter your email address...") seemingly at random. Is this pattern codified anywhere (Accessibility standards, Open UX research standards, UX Laws, etc.)?
I'm aware of an affordability UI pattern for dropdown items where if there are "···" generally means that there is something else to come when you select it. Are these two connected somehow?