Hi, adjacent word repition in rg.

[jianhe-fun]

I tried. then I failed.
https://blog.burntsushi.net/ripgrep/
How to find add adjacent word repetition in rg.
for example string as: "hello hello world"
how to found out "hello hello".

[BurntSushi]

$ echo 'hello hello world' | rg -Po '(\w+) (\1)'
hello hello