See https://github.com/w3c/csswg-drafts/issues/1518
The spec says that letter-spacing at the end of a line should be dropped:
but no implementations do this. It does look bad in justified text (unrealistic example attached).
The spec says that letter-spacing at the end of a line should be dropped:
Letter-spacing must not be applied at the beginning or at the end of a line.
but no implementations do this. It does look bad in justified text (unrealistic example attached).