Fix indent

Author: giadarol

ring_of_CPUs.py

@@ -83,7 +83,7 @@ def __init__(self, sim_content, N_pieces_per_transfer=1, force_serial = False, c
             self.comm.Barrier() # wait that all are done with the init
 
 
-   def init_sim_objects(self):
+    def init_sim_objects(self):
 
         self.sim_content.init_all()
         if self.I_am_the_master: