[johnday]

A tab in vscode has a dot in it if the contents are modified since last save.

If a save is complete, that dot will go away. If there is no dot, the file is unmodified.

[abraxas]

Speaking of which, it also changed the decades old symbol for unsaved files (an asterisk) for no discernable reason. Given that it also doesn't save on loss of focus it led to my many WTFs when I first started using it.