+ * input/test/engraver-example.ily: update version number.
+
+ * VERSION (PACKAGE_NAME): release 2.7.39
+
+ * lily/note-spacing.cc (get_spacing): heighten threshold where
+ accidentals/arpeggios influence previous spacing fully.
+
+ * lily/rest.cc (y_offset_callback): only use direction if
+ staff-position wasn't set before.
+
+ * lily/bar-number-engraver.cc: add support for
+ barNumberAlignSymbol.
+ add ADD_ACKNOWLEDGER() call for break_aligned. Fixes bar-number-breathe
+
+ * lily/pointer-group-interface.cc (set_ordered): new function.
+ (add_unordered_grob): new function.
+
+ * lily/grob-array.cc (Grob_array): grob-arrays are always assumed
+ to ordered, unless the opposite has been proved. This fixes
+ random reordering of large object groups across linebreaks,
+ eg. beams.
+