1, 0, 0, (SCM s),
"Is @var{s} a direction? Valid directions are @code{-1},"
" @code{0}, or@tie{}@code{1}, where @code{-1} represents"
- " left or down, @code{1} represents right or up, and @code{0}"
+ " left or down, @code{1}@tie{}represents right or up, and @code{0}"
" represents a neutral direction.")
{
if (scm_is_number (s))