Merge remote-tracking branch 'origin/stable/2.16' into translation

diff --cc Documentation/de/essay/engraving.itely
Simple merge

diff --cc Documentation/de/learning/fundamental.itely
Simple merge

diff --cc Documentation/de/notation/ancient.itely
Simple merge

diff --cc Documentation/de/notation/changing-defaults.itely
Simple merge

diff --cc Documentation/de/notation/fretted-strings.itely
Simple merge

diff --cc Documentation/de/notation/percussion.itely
Simple merge

diff --cc Documentation/de/notation/rhythms.itely
Simple merge

diff --cc Documentation/de/notation/spacing.itely
Simple merge

diff --cc Documentation/de/notation/vocal.itely
Simple merge

diff --cc Documentation/de/usage/lilypond-book.itely
Simple merge