https://go.googlesource.com/go/+/refs/heads/release-branch.go1.15/src/net/testdata/singleline-hosts
src/net/testdata/singleline-hosts - go - Git at Google
srctestdatahostsgogit
https://bugzilla.mozilla.org/show_bug.cgi?id=567062
567062 - Wrong number in "x more" recipients button for singleline case
VERIFIED (rsx11m.pub) in Thunderbird - Message Reader UI. Last updated 2010-10-14.
wrong numbermore recipientsx