spanner text vertical alignment

[Bertalan Fodor]

Hello,

I have the following spanner text.

           \override Voice.TextSpanner #'edge-text =
               #(cons
                   "rit."
                   (markup (#:upright #:bold "meno mosso,") (#:tiny 
#:note "4" 0.7) "= 96")
               )

It will make a tempo mark at the end of the spanner. The problem is that 
the end-text is centered with the spanner, and because of the stem of 
the note, it is not appropriate, because the "meno mosso" should be 
centered, not the whole markup.

Thanks,

Bert