From: http://leloup.blog.51cto.com/blog/1113857/596107

在vim的官方FAQ （http://vimdoc.sourceforge.net/cgi-bin/vimfaq2html3.pl#14.6）找到的：

格式化全文： gg=G

自动缩进当前行： ==

 

这个是原文节选：

14.6. 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

For more information, read

     :help gg
     :help =
     :help G
     :help 'formatprg'
     :help C-indenting