LY_DEFINE (ly_position_on_line_p, "ly:position-on-line?",
2, 0, 0, (SCM sg, SCM spos),
"Return whether @var{spos} is on a line of the staff associated"
- " with the the grob @var{sg} (even on an extender line).")
+ " with the grob @var{sg} (even on an extender line).")
{
LY_ASSERT_SMOB (Grob, sg, 1);
LY_ASSERT_TYPE (scm_is_number, spos, 2);