feat: exit 1 "file not found"

[teknopaul]

Hi not sure if this is the correct forum...

exit builtin accepts one and only one arg currently.

Would it be backwards compatible and generally useful to support echoing a 
reason for exiting?

test -f file || exit 2 "file not found"

good bash scripters handle and report errors

 have seen lots of functions in the wild like

function die() {
  echo $@
  exit 1
} 

function die() {
  code=$1
  shift
  echo $@
  exit $code
} 

but none has made its way to a reliably available default, so its oft repeated, 
and more often omitted so failure prints nothing.

Could it be a candidate for an extension to bash's exit builtin?  I don't think 
anything existing would break, currently we get too many args and it does not 
exit