musescore/MuseScore — pull request #588 by MarcSabatella (2013-12-11 16:35:19+00:00)
Title: fix #23879, #23883: Linking of chord symbols

By popular request, chord symbols should not be duplicated between linked staves *within* a score/part - only between the score and the part. Also, chord symbols added to score should reflect in part even when not attached to an existing note (eg, multiple chord symbols in an otherwise empty measure).