【转】Vim FAQ -- 自动缩进代码
转自：http://www.slyar.com/blog/vim-indentation.html
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gg=G 就可以了，具体见FAQ
How do I format/indent an entire file?
You can format/indent an entire file using the gg=G command, where
gg - Goto the beginning of the file
= - apply indentation
G - till end of file
