Add minor code change, what's new doc fix

Author: stangirala

doc/source/whatsnew/v0.20.0.txt

@@ -372,7 +372,7 @@ Other Enhancements
 - ``pd.read_csv()`` will now raise a ``ParserError`` error whenever any parsing error occurs (:issue:`15913`, :issue:`15925`)
 - ``pd.read_csv()`` now supports the ``error_bad_lines`` and ``warn_bad_lines`` arguments for the Python parser (:issue:`15925`)
 - ``pd.read_csv()`` will now raise a ``csv.Error`` error whenever an end-of-file character is encountered in the middle of a data row (:issue:`15913`)
-- ``parallel_coordinates()`` now has a ``sort_labels`` keyword arg that sorts class labels and the colours assigned to them (:issue:`15908`)
+- ``parallel_coordinates()`` has gained a ``sort_labels`` keyword arg that sorts class labels and the colours assigned to them (:issue:`15908`)
 
 
 .. _ISO 8601 duration: https://en.wikipedia.org/wiki/ISO_8601#Durations

pandas/tools/plotting.py

@@ -780,7 +780,7 @@ def parallel_coordinates(frame, class_column, cols=None, ax=None, color=None,
                                         colormap=colormap, color_type='random',
                                         color=color)
 
-    if sort_labels is True:
+    if sort_labels:
         classes = sorted(classes)
         color_values = sorted(color_values)
     colors = dict(zip(classes, color_values))