Include documentation in both, using common phrasing. Take sys.argv as
a parameter, along with sys.stdout and sys.stderr, so that we can
invoke them from python when importing into a python session to debug
or test. Supply the script name to the argument parser as prog, so it
can correctly report it and forward the rest of argv to parse_args().
Remove comments anticipating one of the several calendars we don't yet
support; the existing entries suffice to make clear what shall be
needed when we get round to adding more.
Change-Id: I2cebd385679e3c84d4ccf899e60091ac823ad10d
Reviewed-by: Mate Barany <mate.barany@qt.io>
f83206229e