Formatting bug with 2.10.20

[Raphael Manfredi]

I've found a weird formatting bug.

In the attached file, the exo117a.ly is wrongly formatted on a single
line, as you can witness in the attached PNG rendering.

Changing the line 57 to read:

        \transpose d fis { \CanonLeaderThird \CanonBodyThird }

will produce something musically incoherent, but which formats
correctly, as witnesses by the attached exo117a-fix.png.

This is very annoying because even if I add a manual \break in the
correct version, the very last note is typesetted too close to the
ending bar.  So there's something abnormal going on here.

Raphael

exo117a.ly
Description: Text document

exo117a-fix.ly
Description: Text document

exo117a.png
Description: PNG image

exo117a-fix.png
Description: PNG image