master
fix(help): Remove extraneous text from built-ins
docs(tutorial): Don't cover 'author' as its not shown
fix(error): Try to polish/clarify messages
docs(tutorial): Explicitly cover required vs optional
docs(exmaples): Drop syntax variants.
docs(derive): Specify arg_required_else_help is set for users
chore: Update from template
fix(error): Match rustc for giving more information