chart
uses a line width of 3 for line charts.
#
# You can use the :line_width
option to customize this value.
#
filename = File.basename(__FILE__).gsub('.rb', '.pdf')
Prawn::ManualBuilder::Example.generate(filename) do
data = {views: {2013 => 182, 2014 => 46, 2015 => 802000000000000000000}}
chart data, type: :line, line_width: 10
end