minor changes

doc/source/advanced.rst

@@ -474,7 +474,7 @@ values across a level. For instance:
 .. ipython:: python
 
    midx = pd.MultiIndex(levels=[['zero', 'one'], ['x', 'y']],
-                        codes=[[1, 1, 0, 0],[1, 0, 1, 0]])
+                        codes=[[1, 1, 0, 0], [1, 0, 1, 0]])
    df = pd.DataFrame(np.random.randn(4, 2), index=midx)
    df
    df2 = df.mean(level=0)

doc/source/whatsnew/v0.24.0.rst

@@ -1101,7 +1101,7 @@ Deprecations
 ~~~~~~~~~~~~
 
 - :attr:`MultiIndex.labels` has been deprecated and replaced by :attr:`MultiIndex.codes`.
-  The functionality is unchanged. This new name better reflects the natures of
+  The functionality is unchanged. The new name better reflects the natures of
   these codes and makes the ``MultiIndex`` API more similar to the API for
   :class:`CategoricalIndex`(:issue:`13443`).
   As a consequence, other uses of the name ``labels`` in ``MultiIndex`` have also been deprecated and replaced with ``codes``:

pandas/core/groupby/generic.py

@@ -1191,10 +1191,10 @@ def value_counts(self, normalize=False, sort=True, ascending=False,
             out, left[-1] = out[sorter], left[-1][sorter]
 
         # build the multi-index w/ full levels
-        labels = list(map(lambda lab: np.repeat(lab[diff], nbin), labels[:-1]))
-        labels.append(left[-1])
+        codes = list(map(lambda lab: np.repeat(lab[diff], nbin), labels[:-1]))
+        codes.append(left[-1])
 
-        mi = MultiIndex(levels=levels, codes=labels, names=names,
+        mi = MultiIndex(levels=levels, codes=codes, names=names,
                         verify_integrity=False)
 
         if is_integer_dtype(out):

pandas/core/indexes/multi.py

@@ -633,6 +633,10 @@ def set_codes(self, codes, level=None, inplace=False,
         Set new codes on MultiIndex. Defaults to returning
         new index.
 
+        .. versionadded:: 0.24.0
+
+           New name for deprecated method `set_labels`.
+
         Parameters
         ----------
         codes : sequence or list of sequence