#   ____________________________________________________________________________
#   level 1                                                                 ####
a <- function() {
### . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
### inside the function should not be indented                              ####
  q()
##  ............................................................................
##  same here                                                               ####
}