Replaces all occurrences of #tabstop consecutive spaces with a tab character.

Source Code

# File action_mailer/vendor/text-format-0.6.3/text/format.rb, line 925
def unexpand(to_unexpand = nil)
  to_unexpand = @text if to_unexpand.nil?
  if to_unexpand.class == Array
    to_unexpand.collect { |te| v << __unexpand(te) }
  else
    __unexpand(to_unexpand)
  end
end