Update data carpentry section

[Robinlovelace]

• [ ] description of tibble may be out of date
• [ ] check tidy descriptions
• [ ] Do exercises still make sense
• [ ] Rerun comparisons
• [ ] warnings in 6.4.5
• [ ] rlang warnings

[csgillespie]

Initial thoughts:

• description of tibble may be out of date
• check tidy descriptions
• Do exercises still make sense
• Rerun comparisons
• warnings in 6.4.5
• rlang warnings

---

Broken URLs

files = list.files(".", pattern = "*.Rmd")
urls = suppressWarnings(system2("grep", c("-Eo \"(http|https)://[a-zA-Z0-9\\.\\+:/?=_-]*\"", 
                                          files[5]), stdout = TRUE))

for (url in urls) {
  ping = try(httr::GET(url), silent = TRUE)
  if (class(ping) == "try-error") {
    cli::cat_bullet(glue::glue("{url}: {ping}"))
  } else if (ping$status != 200) {
    cli::cat_bullet(glue::glue("{url}: {ping$status}"))
  }
}