Issue 1825 in lilypond: convert-ly produces no output having run on up-to-date source

[lilypond]

Status: Accepted
Owner: ----
Labels: Type-Scripts Priority-Medium

New issue 1825 by brownian.box: convert-ly produces no output having run on  
up-to-date source
http://code.google.com/p/lilypond/issues/detail?id=1825

Reported by Patrick Schmidt,
http://lists.gnu.org/archive/html/bug-lilypond/2011-08/msg00460.html :

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Hi all,

by accident I noticed that when you try to upgrade a file (to version  
2.14.2) that is already up to date (2.14.0) with

convert-ly myfile.ly > mynewfile.ly

a new but empty file is created. There aren't any error messages. When you  
fake an older version number everything works out and a new file (with  
content) is created.
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