Polish

Analysis/mat_to_shapefiles.py

 #!/usr/bin/env python3
 
-"""Converts an adt_YYYYMMDD.mat file to a triplet of shapefiles. The
+"""Converts an adt_YYYY-MM-DD_v6.mat file to a triplet of shapefiles. The
     mat file should be in v6 format. The data is the set of detected
     instantaneous eddies at a given date.