grammar fix
grammar fix

Co-authored-by: Jason Grout <b4672d8584c95d3dfb8fbf3ae0597a23208547c6@users.noreply.github.com>
ipython/ipywidgets,jupyter-widgets/ipywidgets,ipython/ipywidgets,ipython/ipywidgets,ipython/ipywidgets,ipython/ipywidgets,jupyter-widgets/ipywidgets,jupyter-widgets/ipywidgets,jupyter-widgets/ipywidgets