prawn：Prawn::Table::Cell :font_style

everyday Ruby 
#!/usr/bin/env ruby

require "prawn"
require "prawn/layout"

pdf = Prawn::Document.new

y = 700
[:bold, :italic].each do |fs|
  Prawn::Table::Cell.new(
    :document   => pdf,
    :point      => [100, y],
    :text       => "sample text #{fs}",
    :font_style => fs).draw
  y -= 50
end

pdf.render_file(File.basename($0, ".rb") + ".pdf")

いまいち謎な結果〜