OptionParser#help

() -> ::String

help

# File tmp/rubies/ruby-3.4.1/lib/optparse.rb, line 1407
def help; summarize("#{banner}".sub(/\n?\z/, "\n")) end

Returns option summary string.

See also #getopts #inc #environment #load also in 4.1 · 4.0 · 3.3 · 3.2 · 3.1 · 3.0