Parsing and evaluation tools that provide more details than the
default.
c(person("Hadley", "Wickham", role = "aut"), person("Yihui", "Xie",
    role = c("cre", "ctb"), email = "xie@yihui.name"), person("Barret",
    "Schloerke", role = "ctb"))
Parsing and evaluation tools that make it easy to recreate the
    command line behaviour of R.
Hadley Wickham [aut],
  Yihui Xie [cre, ctb],
  Barret Schloerke [ctb]