removing possible whitespace in strings input to add_readers_from_list

Author: knutfrode

opendrift/models/basemodel/environment.py

@@ -254,6 +254,7 @@ def add_readers_from_list(self,
 
         if isinstance(urls, str):
             urls = [urls]
+        urls = [u.strip() for u in urls]  # strip whitespace
         if lazy is True:
             from opendrift.readers.reader_lazy import Reader
             readers = [Reader(u) for u in urls]