OptionParser#separator

separator(string)

# File tmp/rubies/ruby-3.3.0/lib/optparse.rb, line 1606
def separator(string)
  top.append(string, nil, nil)
end

Add separator in summary.

See also #remove #summarize #release #terminate also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0