How to remove html tags without /n in ruby's regular expression

Error Occurring

railsc cannot use helpers.strip_tags when playing scripts.
If you try to remove the html tag with gsub and regular expression, a new line code of "/n" will also be included

Expected behavior

I want to erase the html tag without /n in the middle below

<p>Yamada/n Taro</p>

Error Contents

By describing this regular expression, html tags (p tags) can be removed, but "/n" can also be removed altogether.

User.first.User_name.gsub(/<("[^"]*"|'[^']*'|[^'">])*>/, "")

Tried

Tried the description except "/n" before specifying the html tag.
I can't remove it well.

User.first.User_name.gsub(^(?!.*/n).$/<("[^"]*"|'[^']*'|'[^']*'|[^'">])*>/, "")

The condition is

• Remove tags

• Except line feed codes

remove a tag

I'm in trouble because I can't use regular expressions well.
If you have any knowledge, I would appreciate it if you could let me know.