notebook: improve appearance of code
notebook: improve appearance of code

jar1karp/rstudio,jrnold/rstudio,jrnold/rstudio,thklaus/rstudio,githubfun/rstudio,githubfun/rstudio,thklaus/rstudio,more1/rstudio,suribes/rstudio,john-r-mcpherson/rstudio,pssguy/rstudio,more1/rstudio,sfloresm/rstudio,thklaus/rstudio,john-r-mcpherson/rstudio,maligulzar/Rstudio-instrumented,piersharding/rstudio,maligulzar/Rstudio-instrumented,jzhu8803/rstudio,jrnold/rstudio,pssguy/rstudio,tbarrongh/rstudio,brsimioni/rstudio,jzhu8803/rstudio,jar1karp/rstudio,piersharding/rstudio,maligulzar/Rstudio-instrumented,jar1karp/rstudio,nvoron23/rstudio,sfloresm/rstudio,JanMarvin/rstudio,jzhu8803/rstudio,jzhu8803/rstudio,jar1karp/rstudio,vbelakov/rstudio,sfloresm/rstudio,suribes/rstudio,brsimioni/rstudio,sfloresm/rstudio,edrogers/rstudio,john-r-mcpherson/rstudio,john-r-mcpherson/rstudio,brsimioni/rstudio,edrogers/rstudio,vbelakov/rstudio,vbelakov/rstudio,edrogers/rstudio,githubfun/rstudio,jzhu8803/rstudio,edrogers/rstudio,john-r-mcpherson/rstudio,githubfun/rstudio,more1/rstudio,piersharding/rstudio,nvoron23/rstudio,maligulzar/Rstudio-instrumented,JanMarvin/rstudio,jzhu8803/rstudio,pssguy/rstudio,JanMarvin/rstudio,piersharding/rstudio,thklaus/rstudio,sfloresm/rstudio,tbarrongh/rstudio,more1/rstudio,pssguy/rstudio,sfloresm/rstudio,vbelakov/rstudio,JanMarvin/rstudio,githubfun/rstudio,suribes/rstudio,thklaus/rstudio,maligulzar/Rstudio-instrumented,tbarrongh/rstudio,JanMarvin/rstudio,edrogers/rstudio,jar1karp/rstudio,jar1karp/rstudio,sfloresm/rstudio,thklaus/rstudio,thklaus/rstudio,more1/rstudio,piersharding/rstudio,nvoron23/rstudio,maligulzar/Rstudio-instrumented,brsimioni/rstudio,piersharding/rstudio,githubfun/rstudio,jrnold/rstudio,githubfun/rstudio,jar1karp/rstudio,edrogers/rstudio,more1/rstudio,jrnold/rstudio,jrnold/rstudio,jar1karp/rstudio,vbelakov/rstudio,nvoron23/rstudio,nvoron23/rstudio,jrnold/rstudio,sfloresm/rstudio,more1/rstudio,piersharding/rstudio,edrogers/rstudio,jar1karp/rstudio,tbarrongh/rstudio,brsimioni/rstudio,pssguy/rstudio,tbarrongh/rstudio,jzhu8803/rstudio,suribes/rstudio,brsimioni/rstudio,maligulzar/Rstudio-instrumented,edrogers/rstudio,john-r-mcpherson/rstudio,jzhu8803/rstudio,JanMarvin/rstudio,pssguy/rstudio,nvoron23/rstudio,jrnold/rstudio,brsimioni/rstudio,nvoron23/rstudio,pssguy/rstudio,piersharding/rstudio,tbarrongh/rstudio,brsimioni/rstudio,maligulzar/Rstudio-instrumented,john-r-mcpherson/rstudio,thklaus/rstudio,JanMarvin/rstudio,suribes/rstudio,john-r-mcpherson/rstudio,tbarrongh/rstudio,JanMarvin/rstudio,githubfun/rstudio,suribes/rstudio,jrnold/rstudio,suribes/rstudio,piersharding/rstudio,pssguy/rstudio,tbarrongh/rstudio,vbelakov/rstudio,JanMarvin/rstudio,vbelakov/rstudio,suribes/rstudio,vbelakov/rstudio,maligulzar/Rstudio-instrumented,more1/rstudio