improve formatting for error + traceback
improve formatting for error + traceback

rgbkrk/nteract,rgbkrk/nteract,jdetle/nteract,jdetle/nteract,captainsafia/nteract,nteract/nteract,captainsafia/nteract,jdetle/nteract,rgbkrk/nteract,captainsafia/nteract,nteract/nteract,nteract/composition,nteract/nteract,jdetle/nteract,nteract/composition,jdfreder/nteract,captainsafia/nteract,jdfreder/nteract,jdfreder/nteract,nteract/composition,nteract/nteract,nteract/nteract,rgbkrk/nteract,rgbkrk/nteract,jdfreder/nteract