Merge branch 'master' into lilypond/translation

Merge branch 'master' into lilypond/translation

* master:
  Revert lys-to-tely changes
  Add stub for - subsection.
  Linking to ^_ section.
  Update from Patrick.
  Typo.
  Typo.
  Updates from Trevor.
  Disable version macro.
  Revert "Always use Lily current version number in docs"
  Fix 554.
  Fix 550.
  Fix 577.
  Thinko: compare abs of both positions.
  Take git diff from src-dir for test target.
  Use \addlyrics for lyric-hyphen.ly
  Use \addlyrics for lyric-hyphen-break.ly