png, tools, stringr, magrittr, gridExtra, tibble, testthat,
grDevices, knitr, rmarkdown, tidyverse, gtable, covr, maps,
nycflights13, ggplot2movies
png, tools, stringr, markdown, magrittr, gridExtra, tibble,
testthat, grDevices, knitr, rmarkdown, tidyverse, gtable, covr,
maps, nycflights13, ggplot2movies