fixed type in a comment

Author: jjmaldonis

spawn.py

@@ -32,7 +32,7 @@ def spawn(args, size):
  # First use a barrier to interact with parent.barrier() in worker_multiple.py
  intercomm.barrier()
 
- # Then use a reduce to show how to pass information back and forth
+ # Then use a gather to show how to pass information back and forth
  intercomm.barrier()
  results = intercomm.gather(None, root=MPI.ROOT)
  results = {color: data for color, data in results} # Remove duplicate color info