Investigate why wide text tracking extends underlines and outlines past the end of the text

[LucasSteer]

Increasing text tracking adds extra space between characters. However, increasing the tracking also adds that additional space past the last character as well; this is particularly noticeable for underlines (text decorations) and focus outlines.

Outline with tracking-normal:

Underline (text decoration) with tracking normal:

Outline with tracking-widest:

Underline (text decoration) with tracking widest: