Doc: add Known issue limiting calculation of LilyPond rationals (3084) (issue 7071044)

[tdanielsmusic]

Reviewers: ,

Message:
Pushed to staging as
a46782b6db53f55c0ce494f5ca001e187b81e4e1
Closing ...

Description:
Doc: add Known issue limiting calculation of LilyPond rationals (3084)

Please review this at https://codereview.appspot.com/7071044/

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  
50eb9f7ad1f00d37645cadc93f03c60755b95c31..f53c42f8815c2e40bf07b63806e928d0ca17830a  
100644
--- a/Documentation/notation/rhythms.itely
+++ b/Documentation/notation/rhythms.itely
@@ -380,6 +380,15 @@ Notation Reference:
 Snippets:
 @rlsr{Rhythms}.

address@hidden
+The calculation of the position within a measure must take into
+account all the scaling factors applied to the notes within that
+measure and any fractional carry-out from earlier measures.  This
+calculation is carried out using rational numbers.  If an intermediate
+numerator or denominator in that calculation exceeds 2^30 the
+execution and typesetting will stop at that point without indicating
+an error.
+

 @node Ties
 @unnumberedsubsubsec Ties