DOCS: add warning about slur termination in same voice \

diff --git a/Documentation/notation/expressive.itely b/Documentation/notation/expressive.itely
index 06b5143b54baf9bd40712a56f2187fd6100a8296..696816ca295ad979c3d4476c099d387da8addc7e 100644 (file)
--- a/Documentation/notation/expressive.itely
+++ b/Documentation/notation/expressive.itely
@@ -508,6 +508,9 @@ doits.
 
 @notation{Slurs} are entered using parentheses:
 
+@warning{In polyphonic music, a slur must be terminated
+in the same voice it began.}
+
 @lilypond[verbatim,quote,relative=2]
 f4( g a) a8 b(
 a4 g2 f4)