fix bug #150
12.1.md
12.2.md
12.3
12.4
Merge pull request #153 from hongruiqi/review

12.x
fix exists check
Merge pull request #154 from hongruiqi/genepub_fix

fix exists check
11.x
Merge pull request #155 from hongruiqi/review

11.x
Update 04.2.md
Update 04.2.md
Merge pull request #156 from polaris1119/master

文字修改
Merge pull request #2 from astaxie/master

Sync Changes