Fix misspellings
Merge pull request #643 from wojtekk/patch-1

Fix misspellings
[zh] Change font of pdf format to 'WenQuanYi Micro Hei', which looks better
Merge pull request #644 from riccoyu/master

[zh] Change font of pdf format to 'WenQuanYi Micro Hei', which looks bet...
Merge branch 'master' into bsch_tradortho