如何破译这个VimGolf答案？

Question

the VimGolf challenge

发自：

Make the pairs of lines match up by making each second line same as first:

# Appending text:
The name "Vim" is an acronym for "Vi IMproved"
The name "Vim" is an acronym for

# Editing text:
Vim is a text editor originally released by Bram Moolenaar in 1991 for the Amiga
Trivia: Vim is a text editor released by Bram Moolenaar in 1991 for the Amiga

# Deleting text:
Vim has a vi compatibility mode
Vim has a vi compatibility mode but when not in this mode Vim has many enhancements over vi

至：

Make the pairs of lines match up by making each second line same as first:

# Appending text:
The name "Vim" is an acronym for "Vi IMproved"
The name "Vim" is an acronym for "Vi IMproved"

# Editing text:
Vim is a text editor originally released by Bram Moolenaar in 1991 for the Amiga
Vim is a text editor originally released by Bram Moolenaar in 1991 for the Amiga

# Deleting text:
Vim has a vi compatibility mode
Vim has a vi compatibility mode

最需要击键次数最少的答案之一是：

:g/v/t.|+d<CR>ZZ

我在试着理解为什么这是可行的。在这种情况下，v、.、|的含义是什么？此外，在:help中哪里可以找到相关的部分

谢谢。

Answer 1

:g/v/command

对与v匹配的每一行执行command。

:t.

复制其自身下面的当前行。

之后，删除原来的“第二行”。

简而言之，该解决方案的作者正在跳出框框:他不是操作第二行，而是简单地复制第一行并删除第二行。

至于文档：

:help :g
:help :t