trick for wrapping headings in TOC?

[Robert Lauriston]

TOC paragraph tags in this project have a single Right tab stop at the
right margin.

If a heading is just the wrong length, only the page number is bumped
the next line and appears at the left margin. If it's enough longer
that a word wraps to the next line, the page number is at the right
place.

Is there a fix for this other than the kludge of putting a
non-breaking space between the last two words of the heading?

foo . . . . . . . . . . 1
bar bar bar bar bar
2
bar bar bar bar bar
 bar . . . . . . . . . 3