class Thor::Option

def usage(padding = 0)
  sample = if banner && !banner.to_s.empty?
             "#{switch_name}=#{banner}"
           else
             switch_name
           end
  sample = "[#{sample}]" unless required?
  if aliases.empty?
    (' ' * padding) << sample
  else
    "#{aliases.join(', ')}, #{sample}"
  end
end