when there is `nan` in evolve.csv pandas read it as str 
remove the space before fix that 
Signed-off-by: Michael Ben ami <31584614+mbenami@users.noreply.github.com>
Signed-off-by: Michael Ben ami <31584614+mbenami@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>