2.15.9 regtests

[Phil Holmes]

Well - there are too many differences on the official page for me to count. 
It was clearly going to be iffy when I looked at the "items still to load" 
in the browser and it was over 1100.  In my pixel comparator, I've got 1,031 
difference files to check.

There are 2 obvious causes of this: one is the slight clef change; the other 
is a slight spacing change - it looks like, as a general rule, 2.15.9 is 
slightly more compact on ragged-right versus 2.15.7 (which is my local 
baseline).

I'll attach one difference file which I don't understand - is this the 
effect of the change in spacing to the time sig?

Not sure how we can take this forward?  In principle I guess we could 
temporarily revert the clef change and try to find what caused the spacing 
change, and then do a specific release with just those.  Or we could take 
shifts in checking images.  Or we could keep our fingers crossed.

--
Phil Holmes

accidental-broken-tie-spacing.png
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