see:
http://monkeyhacks.com/post/sublime-text-3-copy-as-rtf-and-html-with-sublimehighlight
https://github.com/n1k0/SublimeHighlight
我们需要借助SublimeHighlight插件实现。
如何安装
首先打开包管理器：CTRL+SHIFT+P
输入add
添加下面url：
https://github.com/n1k0/SublimeHighlight/tree/python3
然后再次按下CTRL+SHIFT+P，输入install
查找SublimeHighlight按下回车安装即可。
如何使用
SublimeHighlight: convert to HTML:
will convert current code to highlighted HTML in a new SublimeText tab.
SublimeHighlight: convert to RTF:
will convert current code to highlighted RTF in a new SublimeText tab.
SublimeHighlight: view as HTML:
will convert current code to highlighted HTML and open it in your default browser.
SublimeHighlight: view as RTF:
will convert current code to an RTF document and open the generated file with your default program.
SublimeHighlight: copy to clipboard as HTML:
will convert current code to highlighted HTML and store it into the system clipboard.
SublimeHighlight: copy to clipboard as RTF:
will convert current code to raw highlighted RTF and store it into the system clipboard.
