word wrap

Hello,
I found that HTML-RENDER can't support word break in Chinese.
Like Below
Right show:
中文中文中文
中，中文中文

Wrong Show:
中文中文中文中
，中文中文

please help me to check it.

thanks.

The issue names no files, tests, or entry points. Start by reproducing the Chinese word-wrapping case in HTML-RENDER and compare the expected and actual line breaks; done means Chinese punctuation and text wrap at the expected boundaries.

索引モデルが issue の本文から書いたものです。