A `Label` no longer wraps long text: With `ipywidgets-5.2.2` + `widgetsnbextension-1.2.6`:  With `ipywidgets-6.0.0.beta5` + `widgetsnbextension-2.0.0b7`: 
A
Labelno longer wraps long text:With

ipywidgets-5.2.2+widgetsnbextension-1.2.6:With

ipywidgets-6.0.0.beta5+widgetsnbextension-2.0.0b7: