Backport "Test chars safely when highlighting" to 3.3 LTS#372

tgodzik wants to merge 2 commits intobackport-lts-3.3-22898scala/scala3-lts:backport-lts-3.3-22898from

backport-lts-3.3-22918scala/scala3-lts:backport-lts-3.3-22918Copy head branch name to clipboard