请问ruby代码这里为什么出错
start_index_string = "<span class=/"font_666/">[美]</span>"

这行报错:

ruby.txt:54: syntax error, unexpected tIDENTIFIER, expecting keyword_end
                start_index_string = "<span class=/"font_666/">[缇</span>"
                                                            ^

[解决办法]
start_index_string = "<span class=\\\"font_666\\\">[美]</span>"