warning: couldn't fit music on page: overflow is 8.224344

[Nick Payne]

I'm suddenly seeing this warning in the log output as I'm going through 
adding fingering and barring to a score of two pages, and the bottom 
stave on page one goes beyond the bottom margin with some of the notes 
disappearing off the bottom of the page. Page two is fine. If I add

    between-system-spacing = #'((space . 2) (padding . 2) 
(stretchability . 2) (minimum-distance . 0))

to the paper block, then the staves on page one no longer flow off the 
page (though the error still appears in the log but with a different 
numerical value of 0.384688), but page two is now not obeying the 
ragged-bottom = ##f and ragged-last-bottom = ##f in the paper block, as 
there is now about a 6cm gap between the final stave on page two and the 
tagline, and all the staves on page two are crammed too close 
vertically. Using v.2.13.31.

Nick