Opensource.guide: Typesetting error in Chinese pages rendering using Firefox

[zhaiyusci]

Hi!
I find a problem when I use Firefox browsing the Chinese translation of the guide.
The problem can be easily found if look at the screen shot I upload. In Firefox, the Chinese subtitles do not wrap. In Chrome, they behave properly. No such issue in English page.
I am using Firefox 64.0.

[mlinksva]

Hi @zhaiyusci thanks for the bug report! I can reproduce this; direct link to URL screenshot is taken of https://opensource.guide/zh-cn/how-to-contribute/#what-it-means-to-contribute

It seems to have to do with keep-all introduced in https://github.com/github/opensource.guide/pull/714 cc @lqez

It looks like this improves Chrome's word breaking for CJK but causes Firefox to not break at all, at least in some cases? I don't really know anything about this subject area and quick searching doesn't help me. Hopefully someone who knows something will know how to fix!

[lqez]

I will try to figure out. Thanks for CC.

[mlinksva]

@lqez fixed this with #792, thanks!

If any Chinese or Japanese expert wishes to enable specifically for those languages as @lqez did for Korean in #792 and get working in both Firefox and Chrome, they can in the future.