Change block_size -> block_and_thread_numbers

pystencils/gpucuda/indexing.py

@@ -125,7 +125,7 @@ class AbstractIndexing(abc.ABC):
                     pycuda.driver.Context.synchronize()
 
                 current_time = timeit.timeit(profile_call, number=1)
-                print(f'{block_size} takes {current_time} ({num_profile_calls})')
+                print(f'{self._block_size} takes {current_time} ({num_profile_calls})')
                 if current_time < best_timing:
                     best_timing = current_time
                     current_best = block_and_thread_numbers