revert back to using list comprehension rather than list and map

scripts/xy_grid.py

@@ -197,7 +197,7 @@ class Script(scripts.Script):
             if opt.label == 'Nothing':
                 return [0]
 
-            valslist = list(map(str.strip,chain.from_iterable(csv.reader(StringIO(vals)))))
+            valslist = [x.strip() for x in chain.from_iterable(csv.reader(StringIO(vals)))]
 
             if opt.type == int:
                 valslist_ext = []