add subtitle to home index

[zhaiqianfeng]

add subtitle to home index

[ivan-nginx]

@zhaiqianfeng need add config switch for this option.

[zhaiqianfeng]

@ivan-nginx ok. I have improved.

[ivan-nginx]

@zhaiqianfeng ok. there is some errors in your code.

If we open src, we will see:

  <title> 
   Hexo Test 
   
     - Subtitile 
   
</title>

And this is wrong and bad for seo.

But this code will be nice, without excess spaces:

{% block title %}{{ config.title }}{% if theme.index_withsubtitle and config.subtitle %} - {{config.subtitle }}{% endif %}{% endblock %}

---

P.S. REM: also, need to fix all extra spaces on other subpages.

[zhaiqianfeng]

Thank you @ivan-nginx