[STY] Flake8 update flagged variable name

List comprehensions are now linted correctly, I guess?

Author: rmarkello

netneurotools/freesurfer.py

@@ -109,7 +109,7 @@ def _decode_list(vals):
     """ List decoder
     """
 
-    return [l.decode() if hasattr(l, 'decode') else l for l in vals]
+    return [val.decode() if hasattr(val, 'decode') else val for val in vals]
 
 
 def find_parcel_centroids(*, lhannot, rhannot, method='surface',