Percent sign after number won't be spaced #31
Description
Say I have some text like
迈克尔写了 99% 的歌词，但是他觉得没必要说出来。
I think there should have a space after percent sign % and before Chinese character 的 like the example I give above.
I also find pangu.js's description in your README saying:
This plugin (support
Chrome and Firefox) is what you need when surfing the
internet, it will add whitespace between Chinese,
half-width English, digits and symbols automatically.
However what pangu-spacing does is
迈克尔写了 99%的歌词，但是他觉得没必要说出来。