fix_reading_nan_in_evolve (ultralytics#10358)

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>

utils/general.py

@@ -1036,7 +1036,7 @@ def print_mutation(keys, results, hyp, save_dir, bucket, prefix=colorstr('evolve
 
     # Save yaml
     with open(evolve_yaml, 'w') as f:
-        data = pd.read_csv(evolve_csv)
+        data = pd.read_csv(evolve_csv, skipinitialspace=True)
         data = data.rename(columns=lambda x: x.strip())  # strip keys
         i = np.argmax(fitness(data.values[:, :4]))  #
         generations = len(data)