MusicXML: correctly escape backslash inside a string

diff --git a/python/musicexp.py b/python/musicexp.py
index 695f540db362d1b3e6bdef3951ce5d3b001ba9c6..1303af2655145bd3ee7714288d1baeabf1bf7280 100644 (file)
--- a/python/musicexp.py
+++ b/python/musicexp.py
@@ -1036,7 +1036,7 @@ class GlissandoEvent (SpanEvent):
                 "wavy"   : "zigzag"
             }. get (self.line_type, None)
             if style:
-                printer.dump ("\once \override Glissando #'style = #'%s" % style)
+                printer.dump ("\\once \\override Glissando #'style = #'%s" % style)
     def ly_expression (self):
         return {-1: '\\glissando',
             1:''}.get (self.span_direction, '')