If you'd look into the English dictionary, you'd find words like
coffee-table and command-line and built-in and user-friendly. The main
bother in this issue is the inconsistency with the wording "command-line".
Somewhere under the argparse section of the docs it is "command line" and
then shortly after it is "command-line". Make up your mind and be consistent
with one wording. I propose to let it be "command-line" as the major
dictionary of English language writes it, with a hyphen that is. Thank you.