Fans of line feed replacement in VIM

In VIM, we generate a test file under shell: $ echo-e & quot; I \ rlove \ rWQ. & quot; & gt; test, and then open it with vim. it is really I ^ Mlove ^ MWQ. run: % s/\ r/g to find that the file is normal. But there is an exception here: % s/\ r/g... in VIM, we generate a test file in shell: $ echo-e "I \ rlove \ rWQ. "> test and use vim to open it. it is really I ^ Mlove ^ MWQ. run: % s/\ r/g to find that the file is normal. However, there is an exception here. the command % s/\ r/g replaces \ r with \ r, and nothing should change, how can I replace the line break of a file? After a careful check, we found that this problem should start with different line breaks in different systems. The following table is quite familiar to everyone: windows/dos unix mac line break crlf lf cr in SHELL represents \ r \ n \ r16 hexadecimal character 0d0a 0a 0d: in the % s/\ r/g command, the meaning of the First \ r and the second \ r may be different. The First \ r represents the 0d, that is, CR. The second \ r is determined by VIM based on the built-in fileformat variables. See the following table: \ n \ r: set ff = dos 00 0d0a (\ n \ r): set ff = unix 00 0a (\ n): set ff = mac 00 0d (\ r) OK, now we can explain why the above: % s/\ r/g has changed 0d to 0a. There are two other tips: depending on fileformat, vim will automatically add a line break at the beginning of the file, unless it is vim-B xxx at startup, and set noeol must be enabled at the same time. In any case, \ n in VIM is 00 and is displayed as @ in VIM @