This is not a monospaced font used for code:

> also called non-proportional font, is a font whose letters and characters each occupy the same amount of horizontal space

instead, it preserves the width if you apply a weight like BOLD:

> Uniwidth typefaces, on the other hand, are proportionally-spaced typefaces, but every character occupies the same space across different cuts or weights.

This allows visual cues other than color in interactive text such as the :hover CSS pseudo-class.