expect that chunk output file won't exist yet
expect that chunk output file won't exist yet

jar1karp/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jrnold/rstudio,jrnold/rstudio,jrnold/rstudio,JanMarvin/rstudio,jrnold/rstudio,jar1karp/rstudio,jar1karp/rstudio,jar1karp/rstudio,jar1karp/rstudio,jrnold/rstudio,jrnold/rstudio,jrnold/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jrnold/rstudio,jrnold/rstudio,jar1karp/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio