* master:
Minor change from mailist.
Partial fix bug 370.
Fix from mailist.
Minor language tweaks.
Breakable markups with \markuplines.
page ref and labels fix: add `labels' to System interface.
format fixes for svg
use simple-format for stencil.scm
use fancy-format for ice-9 format
use ergonomic-simple-format to save memory use
define and use ergonomic-simple-format
use simple-format / ly:format in backend-library.scm
ly:format: fix ~$ support
don't do expression comparison.
junk ice-9 format
explicitly alias format to simple-format
junk (ice-9 format) in backend
doc why ice-9 in coverage.scm
Allow null spacing and padding in vertical spacing: