Redirect child page to parent

Hello,

I wanted to redirect all child pages to the parent page without causing the “too many redirects” error following these thread https://wordpress.org/support/topic/redirect-all-children-pages-to-parent/ , but the “+” sign was stripped from the regex. Please check screenshots:
[editing redirect regex](https://drive.google.com/open?id=19op0XBoiibIGkJvALwxVMQ9YIK_vviC4)
[after saving redirect]
(https://drive.google.com/open?id=1PDxN4bvFCaaHOEqpU5FHCQqngPmYXLnw)

The solution that worked was to use .{1,}$ ending of the URL instead of the “+” like so:
[regex that worked](https://drive.google.com/open?id=1nihDRImD5HfmvpJpWFpFf2ZiJbjx_Hlg)

Just wanted to give you the heads-up that “+” sign doesn’t work anymore for the scenario.

Thanks