in rb/lib/twitter-text/autolink.rb [431:452]
def tag_attrs(attributes)
attributes.keys.sort_by{|k| k.to_s}.inject("") do |attrs, key|
value = attributes[key]
if BOOLEAN_ATTRIBUTES.include?(key)
value = value ? key : nil
end
unless value.nil?
value = case value
when Array
value.compact.join(" ")
else
value
end
attrs << %(
end
attrs
end
end