French stemmer question

Hi all,

Looking at the stemming algorithm description for French here:

<https://snowballstem.org/algorithms/french/stemmer.html>

I see this:

"...if preceded by eus, delete if in R2, else replace by eux if in R1..."

However, R2 is contained in R1, so the logic seems reversed to me. 
Shouldn't it be:

...if preceded by eus, replace by eux if in R1, else delete if in R2...

Cheers,
Martin