Vim ultra-practical highlights

1. unindent does not match any outer indentation level
The reason is that the file contains a mix of tabs and spaces (refer

Http://blog.csdn.net/shell_picker/article/details/6033023)

Solution: Use spaces. Set tabstop and shiftwidth to the same value, for example, 4, and set expandtab. In this way, spaces are used for the new indent. Press the tab key and all spaces are displayed. If there is a tab in the file, you can use the retab command again to extend all tabs into spaces. This solves the problem.
. Vimrc settings are as follows:

Set tabstop = 4 set softtabstop = 4 set shiftwidth = 4 set expandtabset smarttab