From bbdf994d643ea96c3cabfb40fbe2f4d22af93233 Mon Sep 17 00:00:00 2001
From: David Kastrup <dak@gnu.org>
Date: Fri, 27 Sep 2013 15:40:54 +0200
Subject: [PATCH] Add one-time convert-ly rule for grace beaming

---
 python/convertrules.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/python/convertrules.py b/python/convertrules.py
index 1ab911cca2..2202cf0d99 100644
--- a/python/convertrules.py
+++ b/python/convertrules.py
@@ -3672,6 +3672,12 @@ def conv(str):
         stderr_write (_ ("Staff-padding now controls the distance to the baseline, not the nearest point."))
     return str
 
+@rule((2, 17, 28), r'''\grace { x[ ... ] } -> \grace { x ... }''')
+def conv(str):
+    str = re.sub (r"(\\(?:grace|appoggiatura|acciaccatura|slashedGrace)\s*\{\s*(?:[()a-zA-Z',0-9.]|\\[()])*)\[([^][{}]*)\]((?:[()]|\\[()]|\s)*\})",
+                  r"\1\2\3", str)
+    return str
+
 # Guidelines to write rules (please keep this at the end of this file)
 #
 # - keep at most one rule per version; if several conversions should be done,
-- 
2.39.2