fix doctests

Author: toddrjen

xarray/core/accessor_str.py

@@ -124,7 +124,7 @@ class StringAccessor:
             >>> da1 % {"a": da2}
             <xarray.DataArray (X: 1)>
             array(['<xarray.DataArray (Y: 3)>\\narray([1, 2, 3])\\nDimensions without coordinates: Y'],
-                dtype=object)
+                  dtype=object)
             Dimensions without coordinates: X
     """
 
@@ -590,10 +590,10 @@ def format(
         array([[['spam is unexpected', 'spam is unexpected'],
                 ['egg is unexpected', 'egg is unexpected']],
         <BLANKLINE>
-            [['spam and lancelot are like a duck',
-                'spam and arthur are like a duck'],
+               [['spam and lancelot are like a duck',
+                 'spam and arthur are like a duck'],
                 ['egg and lancelot are like a duck',
-                'egg and arthur are like a duck']]], dtype='<U33')
+                 'egg and arthur are like a duck']]], dtype='<U33')
         Dimensions without coordinates: X, Y, ZZ