Merge branch 'master' into lilypond/translation

Merge branch 'master' into lilypond/translation

* master:
  Spell Texinfo document encoding uppercase
  Fix translated manuals makefile
  Fix cross-references in German and Spanish manuals
  Typo.
  Include a the full example of the workaround for grace note synchronization.
  Revise, correct, simplify.  Still not identical to old input...
  Remove info dirs correctly (part 2).
  Added information on line breaks with beams
  Fix spacing for forced accidentals with a tie.