undo the sorting of dimensions

since they are already sorted for Dataset objects

xarray/core/formatting.py

@@ -13,7 +13,7 @@
 from .duck_array_ops import array_equiv
 from .options import OPTIONS
 from .pycompat import dask_array_type, sparse_array_type
-from .utils import is_dict_like, is_duck_array
+from .utils import is_duck_array
 
 
 def pretty_print(x, numchars: int):
@@ -405,10 +405,7 @@ def indexes_repr(indexes):
 
 
 def dim_summary(obj):
-    dims = obj.sizes
-    if is_dict_like(obj):
-        dims = dict(sorted(dims.items(), key=lambda item: str(item[0])))
-    elements = [f"{k}: {v}" for k, v in dims.items()]
+    elements = [f"{k}: {v}" for k, v in obj.sizes.items()]
     return ", ".join(elements)