check_radar_codes: Check if radar codes are exactly 5 characters
Description
Check if radar codes are exactly 5 characters
Usage
check_radar_codes(radars)
Arguments
radars
character vector. Radar codes to check, e.g. c("bejab",
"bewideu").
Value
NULL. Will stop and show error message if at least one of the
provided radar codes is not exactly 5 characters.