docs clarification

Author: wolph

progressbar/widgets.py

@@ -585,7 +585,7 @@ def __call__(
 
 class FileTransferSpeed(FormatWidgetMixin, TimeSensitiveWidgetBase):
     '''
-    WidgetBase for showing the transfer speed (useful for file transfers).
+    Widget for showing the current transfer speed (useful for file transfers).
     '''
 
     def __init__(
@@ -647,9 +647,7 @@ def __call__(
 
 
 class AdaptiveTransferSpeed(FileTransferSpeed, SamplesMixin):
-    '''
-    WidgetBase for showing the transfer speed, based on the last X samples
-    '''
+    '''Widget for showing the transfer speed based on the last X samples'''
 
     def __init__(self, **kwargs):
         FileTransferSpeed.__init__(self, **kwargs)