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rails--rails/actionmailer/lib/action_mailer/mail_helper.rb

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require 'text/format'
module MailHelper
# Uses Text::Format to take the text and format it, indented two spaces for
# each line, and wrapped at 72 columns.
def block_format(text)
formatted = text.split(/\n\r\n/).collect { |paragraph|
Text::Format.new(
:columns => 72, :first_indent => 2, :body_indent => 2, :text => paragraph
).format
}.join("\n")
# Make list points stand on their own line
formatted.gsub!(/[ ]*([*]+) ([^*]*)/) { |s| " #{$1} #{$2.strip}\n" }
formatted.gsub!(/[ ]*([#]+) ([^#]*)/) { |s| " #{$1} #{$2.strip}\n" }
formatted
end
end