The strength bonus granted by this spell used to be 1 or 2 points, depending
on the casting level.

Now the strength boost is more continuous (not necessarily an integer); for
high level casters who know the spell well, it can exceed two points.

By the way - "info" displays your statistics rounded to the nearest integer.
However, behind the scenes, MUME uses floating point to calculate the effects
of character statistics on the game.