fix a typ0.
Merge pull request #1 from zhang3/master

fix a typ0.
fix gammer
Merge pull request #2 from zhang3/master

感觉这一句有问题
行內元素前後要加上空白 -> 空行
Merge pull request #4 from FreedomKnight/patch-1

行內元素前後要加上空白 -> 空行
Merge branch 'master' into gh-pages
Fix typo