change texinfo ref in C++ docstring.

diff --git a/lily/separation-item.cc b/lily/separation-item.cc
index b099597b71d91cd56dbbba6c71af24159a6a6636..4b29595b669fbe838e032af3e6294fc860dc07e5 100644 (file)
--- a/lily/separation-item.cc
+++ b/lily/separation-item.cc
@@ -256,7 +256,7 @@ Separation_item::extremal_break_aligned_grob (Grob *me,
 
 ADD_INTERFACE (Separation_item,
               "Item that computes widths to generate spacing rods. "
-              "This is done in concert with @ref{separation-spanner-interface}.",
+              "This is done in concert with @ref{separating-group-spanner-interface}.",
 
               "X-extent "
               "conditional-elements "