title: How to suppress display of data.frame row numbers?
body: <p>In Jupyter/R it is convenient to display a data.frame, but default is to show row numbers.  I'd like to display a data.frame without row numbers by default - not by complicating my code with explicit row number removal or special display functions.  Perhaps there is a straight-forward way to adjust repr to do this?  Thanks for your help.</p>