菜鸟笔记vim自带排序函数sort, 在命令行模式下执行:help sort 可查看其具体用法，摘录如下：
Vim has a sorting function and a sorting command. The sorting function can be
found here: sort(), uniq().
:sor :sort
:[range]sor[t][!] [b][f][i][n][o][r][u][x] [/{pattern}/]
Sort lines in [range]. When no range is given all
lines are sorted.
With [!] the order is reversed.
With [i] case is ignored.
Options [n][f][x][o][b] are mutually exclusive.
example: 忽略大小写，对文件所有行进行排序
:sort i