[Convert] vim-tab to Space

In vim, the tab is automatically converted to a space.
In vim, you sometimes need to convert tabs into spaces. Use the RET command (replace tab ).
[Range] RET [AB]! [New-tabstop]

For example, the tab line from the first line to the end of the file is converted to space, and each tab is replaced by four spaces.
: Set expandtab
: % RET! 4
If 4 is not specified, the current tab width is replaced with space.

Other related commands:
: Set tabstop = 4 set the tab width to 4 characters
: Set shiftwidth = 4 set Automatic indent to 4 characters
: Set expandtab replaces the tab input with Space
: Set noexpandtab do not use space to replace the input of the tab Original: http://hi.baidu.com/ubrowlwchlbjowr/item/cb4b3e98f379a7f22816476e