Tests gregorio-project/gregorio#1121.
Corresponds with gregorio-project/gregorio#1127.
Note: the output for bar-spacing-old changed, but when I reverted my gregorio-project/gregorio changes, it still changed in the same manner, so I guess that either (a) font rendering is slightly different because I'm still on TeX Live 2015 or (b) this was somehow missed in recent merging.
Tests gregorio-project/gregorio#1121. Corresponds with gregorio-project/gregorio#1127.
Note: the output for bar-spacing-old changed, but when I reverted my gregorio-project/gregorio changes, it still changed in the same manner, so I guess that either (a) font rendering is slightly different because I'm still on TeX Live 2015 or (b) this was somehow missed in recent merging.