Replace new lines by spaces in description (#2354)
Replace new lines by spaces in description (#2354)

If first 200 characters have new line(s), Hexo will generate something like this:
```html
<meta name="description" content="We’ve continuously been hearing for a couple of years now that Samsung is working on foldable smartphones.

 The company has a plethora of patents to its name that detail some of the technology">
```

This PR fix this little problem.
DevinLow/DevinLow.github.io,leelynd/tapohuck,wangjordy/wangjordy.github.io,DevinLow/DevinLow.github.io,ppker/hexo,ppker/hexo,kywk/hexi,hexojs/hexo,hexojs/hexo,kywk/hexi,wangjordy/wangjordy.github.io