CSV::Parser#may_quoted?

# File tmp/rubies/ruby-3.0.5/lib/csv/parser.rb, line 693
def may_quoted?
  return false if @quote_character.nil?

  if @input.is_a?(StringIO)
    pos = @input.pos
    sample = @input.read
    @input.seek(pos)
  else
    return false if @samples.empty?
    sample = @samples.first
  end
  sample[0, 128].index(@quote_character)
end