# File lib/asciidoctor/extensions.rb, line 432
    def resolve_regexp name, format
      # TODO memoize these regular expressions!
      if format == :short
        %r(\\?#{name}:\[((?:\\\]|[^\]])*?)\])
      else
        %r(\\?#{name}:(\S+?)\[((?:\\\]|[^\]])*?)\])
      end
    end