Entering "w" in VIM insert mode will automatically jump to the next line.

Question

As described in the title, it will only appear when entering the html tag
The target is

<svg width="300" height="300"><svg>

turn out

<svg 
width="300" height="300">
<svg>

Answer 1

Problem solved
There is a sentence in my vimrc configuration
tw=2

Just delete it

Answer 2

Enter a copy of the vim usage tutorial through vimtutor. There are instructions inside