Environment: Ubuntu 20.04, uutils main branch (git commit 6a5f2aa), GNU coreutils v9.6.3-3189c-dirty

Steps to reproduce:

printf "1Q\n1R\n" | sort -h

What happens now: uutils sort outputs

1Q
1R

What I expected to happen GNU sort outputs

1R
1Q

Notes: this is causing a failure in the GNU test file tests/sort/sort.pl. Apparently R and Q are new suffixes for (very large) block sizes, see https://www.gnu.org/software/coreutils/manual/html_node/Block-size.html