The given source URL is no longer valid

[eddelbuettel]

The URL given as source

nycflights13/R/flights.R

Lines 6 to 7 in 1273c4e

	#' @source RITA, Bureau of transportation statistics,
	#' <https://www.transtats.bts.gov/DL_SelectFields.asp?Table_ID=236>

leads to an error page at transtats.bts.gov as it appears to have moved.