MFC r329606: tail: fix "tail -r" for piped input that begins with '\n' A subtle logic bug, probably introduced in r311895, caused tail to print the first two lines of piped input in forward order, if the very first character was a newline. PR: 222671 Reported by: Jim Long <freebsd-bugzilla@umpquanet.com>, pprocacci@gmail.com Sponsored by: Spectra Logic Corp