# File lib/merb-core/controller/template.rb, line 285
    def add_expr_literal(src, code)
      if code =~ /(do|\{)(\s*\|[^|]*\|)?\s*\Z/
        src << ' @_erb_buf.concat( (' << code << "; "
      else
        src << ' @_erb_buf.concat((' << code << ').to_s);'
      end
    end