-ADD_ACKNOWLEDGER(Paper_column_engraver,item);
-ADD_ACKNOWLEDGER(Paper_column_engraver,note_spacing);
-ADD_ACKNOWLEDGER(Paper_column_engraver,staff_spacing);
-
+ADD_ACKNOWLEDGER (Paper_column_engraver, item);
+ADD_ACKNOWLEDGER (Paper_column_engraver, note_spacing);
+ADD_ACKNOWLEDGER (Paper_column_engraver, staff_spacing);