Fixed stale reference to base.py -> widget.py

IPython/html/widgets/widget_bool.py

@@ -1,4 +1,4 @@
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, Bool, List
 
 class BoolWidget(Widget):

IPython/html/widgets/widget_button.py

@@ -1,7 +1,7 @@
 import inspect
 import types
 
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, Bool, Int
 
 class ButtonWidget(Widget):

IPython/html/widgets/widget_container.py

@@ -1,4 +1,4 @@
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, Bool
 
 class ContainerWidget(Widget):

IPython/html/widgets/widget_float.py

@@ -1,4 +1,4 @@
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, Float, Bool, List
 
 class FloatWidget(Widget):

IPython/html/widgets/widget_int.py

@@ -1,4 +1,4 @@
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, Int, Bool, List
 
 class IntWidget(Widget):

IPython/html/widgets/widget_selection.py

@@ -1,4 +1,4 @@
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, List, Bool
 
 class SelectionWidget(Widget):

IPython/html/widgets/widget_string.py

@@ -1,4 +1,4 @@
-from base import Widget
+from widget import Widget
 from IPython.utils.traitlets import Unicode, Bool, List
 
 class StringWidget(Widget):