Doc: NR @Knownissues for Grace Notes in many Voices (issue4250044)

[pkx166h]

Reviewers: ,

Message:
This is a patch from Phil. I've made some minor formatting changes to
bring it in line with the CG.

http://codereview.appspot.com/4250044

Description:
Doc: NR @Knownissues for Grace Notes in many Voices

This is http://code.google.com/p/lilypond/issues/detail?id=667

Adding a known issue to the grace notes section to show how to
overcome grace notes confusing voice settings.

Please review this at http://codereview.appspot.com/4250044/

Affected files:
  M Documentation/notation/rhythms.itely


Index: Documentation/notation/rhythms.itely
diff --git a/Documentation/notation/rhythms.itely  
b/Documentation/notation/rhythms.itely
index  
40fc4ec61091c45c040027ace5b0a9321f986ee9..ec1913fb58d2ee458bd0cf8b194810896acbb4ab  
100644
--- a/Documentation/notation/rhythms.itely
+++ b/Documentation/notation/rhythms.itely
@@ -3212,10 +3212,40 @@ durations in the other staves.  For the above  
example
 >>
 @end lilypond

+
address@hidden
+The use of grace notes within voice contexts confuses the way the
+voice is typeset. This can be overcome by inserting a rest or note
+between the voice command and the grace note.
+
address@hidden,verbatim]
+accMusic = {
+  \acciaccatura { f8 } e8 r8 \acciaccatura { f8 } e8 r4
+}
+
+\new Staff {
+  <<
+    \new Voice {
+      \relative c'' {
+        r8 r8 \voiceOne \accMusic \oneVoice r8 |
+        r8 \voiceOne r8 \accMusic \oneVoice r8 |
+      }
+    }
+    \new Voice {
+      \relative c' {
+        s8 s8 \voiceTwo \accMusic \oneVoice s8 |
+        s8 \voiceTwo r8 \accMusic \oneVoice s8 |
+      }
+    }
+  >>
+}
address@hidden lilypond
+
 Grace sections should only be used within sequential music
 expressions.  Nesting or juxtaposing grace sections is not
 supported, and might produce crashes or other errors.

+
 @node Aligning to cadenzas
 @unnumberedsubsubsec Aligning to cadenzas