Update benchmarks/user/make-pbs.py

Co-authored-by: Ed Caunt <ed@devitocodes.com>

Author: ggorman

benchmarks/user/make-pbs.py

@@ -4,7 +4,7 @@
 
 
 def generate(args):
-    join = lambda l: ' '.join('%d' % i for i in l)
+    join = lambda l: ' '.join(f'{i}' for i in l)
     args = vars(args)
     args['shape'] = join(args['shape'])
     args['space_order'] = join(args['space_order'])