Fix syntax of some documentation code blocks

Author: Armavica

pymc/distributions/shape_utils.py

@@ -109,22 +109,27 @@ def broadcast_dist_samples_shape(shapes, size=None):
     Examples
     --------
     .. code-block:: python
+
         size = 100
         shape0 = (size,)
         shape1 = (size, 5)
         shape2 = (size, 4, 5)
         out = broadcast_dist_samples_shape([shape0, shape1, shape2],
                                            size=size)
         assert out == (size, 4, 5)
+
     .. code-block:: python
+
         size = 100
         shape0 = (size,)
         shape1 = (5,)
         shape2 = (4, 5)
         out = broadcast_dist_samples_shape([shape0, shape1, shape2],
                                            size=size)
         assert out == (size, 4, 5)
+
     .. code-block:: python
+
         size = 100
         shape0 = (1,)
         shape1 = (5,)

pymc/pytensorf.py

@@ -808,6 +808,7 @@ def collect_default_updates(
     Examples
     --------
     .. code:: python
+
         import pymc as pm
         from pytensor.scan import scan
         from pymc.pytensorf import collect_default_updates