misalignment in header -- fill-line issue?

In the following example, I expect the word "Composer" to be 
right-aligned to the right end of the staff. There is plenty of room, 
and it need not protrude past the end of the staff.

************
\version "2.24.1"
\paper {
   indent = #0
   line-width = #100
}
\header {
   poet = "Poet (Trans. by Translator Name)"
   composer = "Composer"
}

{r1 r r r r r r r}
************

Thanks for your attention to this matter!

James Dietrich

% I expect the word "Composer" to be right-aligned to
% the right end of the staff. There is plenty of room,
% and it need not protrude past the end of the staff.

\version "2.24.1"
\paper {
  indent = #0
  line-width = #100
}
\header {
  poet = "Poet (Trans. by Translator Name)"
  composer = "Composer"
}

{r1 r r r r r r r}