minor: small doc fixes

Author: mrava87

examples/plot_stacked_array.py

@@ -1,6 +1,6 @@
 """
 Stacked Array
-=========================
+=============
 This example shows how to use the :py:class:`pylops_mpi.StackedDistributedArray`.
 This class provides a way to combine and act on multiple :py:class:`pylops_mpi.DistributedArray`
 within the same program. This is very useful in scenarios where an array can be logically

pylops_mpi/DistributedArray.py

@@ -284,6 +284,7 @@ def to_dist(cls, x: NDArray,
             Axis of Distribution
         local_shapes : :obj:`list`, optional
             Local Shapes at each rank.
+        
         Returns
         ----------
         dist_array : :obj:`DistributedArray`