* Documentation/user/music-glossary.tely: bugfix: #'flag-style =

	* Documentation/user/music-glossary.tely: bugfix: #'flag-style =
	#"" -> #'flag-style = #'()

	* lily/cluster-engraver.cc, lily/ligature-bracket-engraver.cc:
	cleanup: removed dead #includes

	* lily/gregorian-ligature-engraver.cc,
	lily/include/gregorian-ligature.hh,
	scm/grob-property-description.scm: small cleanups, small spacing
	fixes

	* lily/gregorian-ligature-engraver.cc, lily/parser.yy,
	lily/vaticana-ligature.cc,
	lily/include/gregorian-ligature-engraver.hh,
	scm/grob-property-description.scm, scm/music-types.scm:
	"porrectus" -> "pes or flexa"

	* ly/engraver-init.ly, scm/grob-description.scm,
	scm/grob-property-description.scm: junked porrectus, now handled
	by ligature code

	* scm/grob-description.scm: bugfix: added space-alist entry for
	breathing sign/custos